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# Transform the string

Given a string s, change the string s according to the rules provided below:

• Delete all the vowels from the string.
• Insert # in front of all the consonants.
• Change the case of all the letters of the string.

Examples:

```Input : aBAcAba
Output :#b#C#B

Input :SunshinE!!
Output :#s#N#S#H#N!!```
Recommended Practice

Approach: First, create a new string by removing all the vowels from the given original string. Now, change the case of every alphabet in this string. Finally, add # in front of every alphabet in the string and this is required string.

Implementation:

## C++

 `// CPP code to transform string``#include ``using` `namespace` `std;` `// Function to change``// character's case``string change_case(string a)``{``    ``int` `l = a.length();``    ` `    ``for``(``int` `i = 0 ; i < l ; i++)``    ``{``        ``// If character is lowercase``        ``// change to uppercase``        ``if``(a[i] >= ``'a'` `&& a[i] <= ``'z'``)``            ``a[i] = a[i] - 32;``            ` `        ``// If character is uppercase``        ``// change to lowercase``        ``else` `if``(a[i] >= ``'A'` `&& a[i] <= ``'Z'``)``            ``a[i] = a[i] + 32;``    ``}``    ` `    ``return` `a;``    ` `}` `// Function to delete vowels``string delete_vowels(string a)``{``    ``string temp = ``""``;``    ``int` `l = a.length();``    ``for``(``int` `i = 0 ; i < l ; i++)``    ``{``        ``//If character is consonant``        ``if``(a[i] != ``'a'` `&& a[i] != ``'e'` `&&``           ``a[i] != ``'i'` `&& a[i] != ``'o'` `&&``           ``a[i] != ``'u'` `&& a[i] != ``'A'` `&&``           ``a[i] != ``'E'` `&& a[i] != ``'O'` `&&``           ``a[i] != ``'U'``&& a[i] != ``'I'``)``            ``temp += a[i];``    ``}``    ` `    ``return` `temp;``    ` `}` `// Function to insert "#"``string insert_hash(string a)``{``    ``string temp = ``""``;``    ``int` `l = a.length();``    ` `    ``for``(``int` `i = 0 ; i < l ; i++)``    ``{``        ``// If character is not special``        ``if``((a[i] >= ``'a'` `&& a[i] <= ``'z'``) ||``           ``(a[i] >= ``'A'` `&& a[i] <= ``'Z'``))``            ``temp = temp + ``'#'` `+ a[i];``        ``else``            ``temp = temp + a[i];``    ``}``    ` `    ``return` `temp;``    ` `}` `// Function to transform string``void` `transformSting(string a)``{``    ``string b = delete_vowels(a);``    ``string c = change_case(b);``    ``string d = insert_hash(c);``    ` `    ``//corner case``    ``// when all the words of string are vowel then string empty after deletion``    ``if``(d==``""``)``      ``cout<<``"-1"``<

## Java

 `// Java code to transform string``import` `java.io.*;` `class` `Gfg``{``    ``// Function to change``    ``// character's case``    ``public` `static` `String change_case(String a)``    ``{``        ``String temp = ``""``;``        ``int` `l = a.length();``        ` `        ``for``(``int` `i = ``0` `; i < l ; i++)``        ``{``            ``char` `ch=a.charAt(i);``            ` `            ``// If character is lowercase``            ``// change to uppercase``            ``if``(ch >= ``'a'` `&&ch <= ``'z'``)``            ``ch = (``char``)(``65` `+ (``int``)(ch - ``'a'``));``            ` `            ``// If character is uppercase``            ``// change to lowercase``            ``else` `if``(ch >= ``'A'` `&&ch <= ``'Z'``)``            ``ch = (``char``)(``97` `+``                 ``(``int``)(ch - ``'A'``));``            ``temp += ch;``        ``}``        ` `        ``return` `temp;``        ` `    ``}``    ` `    ``// Function to delete vowels``    ``public` `static` `String delete_vowels(String a)``    ``{``        ``String temp = ``""``;``        ``int` `l = a.length();``        ` `        ``for``(``int` `i = ``0` `; i < l ; i++)``        ``{``            ``char` `ch = a.charAt(i);``            ` `            ``// If character is consonant``            ``if``(ch != ``'a'` `&& ch != ``'e'` `&&``               ``ch != ``'i'` `&& ch != ``'o'` `&&``               ``ch != ``'u'` `&& ch != ``'A'` `&&``               ``ch != ``'E'` `&& ch != ``'O'` `&&``               ``ch != ``'U'``&&ch != ``'I'``)``               ` `                ``temp += ch;``        ``}``        ` `        ``return` `temp;``        ` `    ``}` `    ``// Function to insert "#"``    ``public` `static` `String insert_hash(String a)``    ``{``        ``String temp = ``""``;``        ``int` `l = a.length();``        ``char` `hash = ``'#'``;``        ` `        ``for``(``int` `i = ``0` `; i < l ; i++)``        ``{``            ``char` `ch=a.charAt(i);``            ` `            ``// If character is not``            ``// special character``            ``if``((ch >= ``'a'` `&& ch <= ``'z'``) ||``               ``(ch >= ``'A'` `&& ch <= ``'Z'``))``                ``temp = temp + hash + ch;``            ``else``                ``temp = temp + ch;``        ``}``        ` `        ``return` `temp;``        ` `    ``}``    ` `    ``// Function to transform string``    ``public` `static` `void` `transformString(String a)``    ``{``        ``String b = delete_vowels(a);``        ``String c = change_case(b);``        ``String d = insert_hash(c);``        ``if``(d==``""``)``              ``System.out.println(``"-1"``);``        ``else``            ``System.out.println(d);``        ` `    ``}``    ` `    ``// Driver function``    ``public` `static` `void` `main (String args[])``    ``{``        ``String a = ``"SunshinE!!"``;``        ``String b = ``"aeiou"``;``        ``// Calling function``        ``transformString(a);``          ``transformString(b);``    ``}``}`

## Python3

 `# Python code to``# transform string` `# def to change``# character's case``def` `change_case(s) :``    ` `    ``a ``=` `list``(s)``    ``l ``=` `len``(s)``    ` `    ``for` `i ``in` `range``(``0``, l) :``    ` `        ``# If character is``        ``# lowercase change``        ``# to uppercase``        ``if``(a[i] >``=` `'a'` `and``           ``a[i] <``=` `'z'``) :``            ``a[i] ``=` `s[i].upper()``            ` `        ``# If character is uppercase``        ``# change to lowercase``        ``elif``(a[i] >``=` `'A'` `and``             ``a[i] <``=` `'Z'``) :``            ``a[i] ``=` `s[i].lower()` `    ``return` `a` `# def to delete vowels``def` `delete_vowels(s) :` `    ``temp ``=` `""``    ``a ``=` `list``(s)``    ``l ``=` `len``(s)``    ``for` `i ``in` `range``(``0``, l) :``    ` `        ``# If character``        ``# is consonant``        ``if``(a[i] !``=` `'a'` `and` `a[i] !``=` `'e'` `and``           ``a[i] !``=` `'i'` `and` `a[i] !``=` `'o'` `and``           ``a[i] !``=` `'u'` `and` `a[i] !``=` `'A'` `and``           ``a[i] !``=` `'E'` `and` `a[i] !``=` `'O'` `and``           ``a[i] !``=` `'U'` `and` `a[i] !``=` `'I'``) :``            ``temp ``=` `temp ``+` `a[i]` `    ``return` `temp` `# def to insert "#"``def` `insert_hash(s) :` `    ``temp ``=` `""``    ``a ``=` `list``(s)``    ``l ``=` `len``(s)``    ` `    ``for` `i ``in` `range``(``0``, l) :``    ` `        ``# If character is``        ``# not special``        ``if``((a[i] >``=` `'a'` `and``            ``a[i] <``=` `'z'``) ``or``        ``(a[i] >``=` `'A'` `and``            ``a[i] <``=` `'Z'``)) :``            ``temp ``=` `temp ``+` `'#'` `+` `a[i]``        ``else` `:``            ``temp ``=` `temp ``+` `a[i]``    ` `    ``return` `temp` `# def to``# transform string``def` `transformSting(a) :` `    ``b ``=` `delete_vowels(a)``    ``c ``=` `change_case(b)``    ``d ``=` `insert_hash(c)` `    ``print` `(d)` `# Driver Code``a ``=` `"SunshinE!!"` `# Calling def``transformSting(a)` `# This code is contributed by``# Manish Shaw(manishshaw1)`

## C#

 `// C# code to transform string``using` `System;` `class` `Gfg``{``    ``// Function to change``    ``// character's case``    ``public` `static` `String change_case(``string` `a)``    ``{``        ``string` `temp = ``""``;``        ``int` `l = a.Length;``        ` `        ``for``(``int` `i = 0 ; i < l ; i++)``        ``{``            ``char` `ch=a[i];``            ` `            ``// If character is lowercase``            ``// change to uppercase``            ``if``(ch >= ``'a'` `&&ch <= ``'z'``)``            ``ch = (``char``)(65 + (``int``)(ch - ``'a'``));``            ` `            ``// If character is uppercase``            ``// change to lowercase``            ``else` `if``(ch >= ``'A'` `&&ch <= ``'Z'``)``            ``ch = (``char``)(97 +``                ``(``int``)(ch - ``'A'``));``            ``temp += ch;``        ``}``        ` `        ``return` `temp;``        ` `    ``}``    ` `    ``// Function to delete vowels``    ``public` `static` `String delete_vowels(String a)``    ``{``        ``String temp = ``""``;``        ``int` `l = a.Length;``        ` `        ``for``(``int` `i = 0 ; i < l ; i++)``        ``{``            ``char` `ch = a[i];``            ` `            ``// If character is consonant``            ``if``(ch != ``'a'` `&& ch != ``'e'` `&&``            ``ch != ``'i'` `&& ch != ``'o'` `&&``            ``ch != ``'u'` `&& ch != ``'A'` `&&``            ``ch != ``'E'` `&& ch != ``'O'` `&&``            ``ch != ``'U'``&&ch != ``'I'``)``                ` `                ``temp += ch;``        ``}``        ` `        ``return` `temp;``        ` `    ``}` `    ``// Function to insert "#"``    ``public` `static` `String insert_hash(String a)``    ``{``        ``String temp = ``""``;``        ``int` `l = a.Length;``        ``char` `hash = ``'#'``;``        ` `        ``for``(``int` `i = 0 ; i < l ; i++)``        ``{``            ``char` `ch=a[i];``            ` `            ``// If character is not``            ``// special character``            ``if``((ch >= ``'a'` `&& ch <= ``'z'``) ||``            ``(ch >= ``'A'` `&& ch <= ``'Z'``))``                ``temp = temp + hash + ch;``            ``else``                ``temp = temp + ch;``        ``}``        ` `        ``return` `temp;``        ` `    ``}``    ` `    ``// Function to transform string``    ``public` `static` `void` `transformString(``string` `a)``    ``{``        ``string` `b = delete_vowels(a);``        ``string` `c = change_case(b);``        ``string` `d = insert_hash(c);``        ` `        ``Console.WriteLine(d);``    ``}``    ` `    ``// Driver function``    ``public` `static` `void` `Main ()``    ``{``        ``string` `a = ``"SunshinE!!"``;``        ` `        ``// Calling function``        ``transformString(a);``    ``}``}` `// This code is contributed by vt_m.`

## PHP

 `= ``'a'` `&&``           ``\$a``[``\$i``] <= ``'z'``)``            ``\$a``[``\$i``] = ``chr``(65 +``                        ``(ord(``\$a``[``\$i``]) -``                         ``ord(``'a'``)));``            ` `        ``// If character is uppercase``        ``// change to lowercase``        ``else` `if``(``\$a``[``\$i``] >= ``'A'` `&&``                ``\$a``[``\$i``] <= ``'Z'``)``            ``\$a``[``\$i``] = ``chr``(97 +``                ``(ord(``\$a``[``\$i``]) -``                 ``ord(``'a'``)));``    ``}``    ``return` `\$a``;``}` `// Function to delete vowels``function` `delete_vowels(``\$a``)``{``    ``\$temp` `= ``""``;``    ``\$l` `= ``strlen``(``\$a``);``    ``for``(``\$i` `= 0 ; ``\$i` `< ``\$l` `; ``\$i``++)``    ``{``        ``// If character``        ``// is consonant``        ``if``(``\$a``[``\$i``] != ``'a'` `&& ``\$a``[``\$i``] != ``'e'` `&&``           ``\$a``[``\$i``] != ``'i'` `&& ``\$a``[``\$i``] != ``'o'` `&&``           ``\$a``[``\$i``] != ``'u'` `&& ``\$a``[``\$i``] != ``'A'` `&&``           ``\$a``[``\$i``] != ``'E'` `&& ``\$a``[``\$i``] != ``'O'` `&&``           ``\$a``[``\$i``] != ``'U'` `&& ``\$a``[``\$i``] != ``'I'``)``            ``\$temp` `= ``\$temp``.``\$a``[``\$i``];``    ``}    ``    ``return` `\$temp``;    ``}` `// Function to insert "#"``function` `insert_hash(``\$a``)``{``    ``\$temp` `= ``""``;``    ``\$l` `= ``strlen``(``\$a``);``    ` `    ``for``(``\$i` `= 0 ; ``\$i` `< ``\$l` `; ``\$i``++)``    ``{``        ``// If character is``        ``// not special``        ``if``((``\$a``[``\$i``] >= ``'a'` `&&``            ``\$a``[``\$i``] <= ``'z'``) ||``           ``(``\$a``[``\$i``] >= ``'A'` `&&``            ``\$a``[``\$i``] <= ``'Z'``))``            ``\$temp` `= ``\$temp` `. ``'#'` `.``                    ``\$a``[``\$i``];``        ``else``            ``\$temp` `= ``\$temp``.``\$a``[``\$i``];``    ``}    ``    ``return` `\$temp``;    ``}` `// Function to``// transform string``function` `transformSting(``\$a``)``{``    ``\$b` `= delete_vowels(``\$a``);``    ``\$c` `= change_case(``\$b``);``    ``\$d` `= insert_hash(``\$c``);` `    ``echo` `(``\$d``);``}` `// Driver Code``\$a` `= ``"SunshinE!!"``;` `// Calling function``transformSting(``\$a``);` `// This code is contributed by``// Manish Shaw(manishshaw1)``?>`

## Javascript

 `// Function to change``// character's case``function` `change_case(a)``{``    ``var` `temp = ``""``;``    ``var` `l = a.length;``    ``for` `(``var` `i=0; i < l; i++)``    ``{``        ``var` `ch = a.charAt(i);``        ``// If character is lowercase``        ``// change to uppercase``        ``if` `(ch >= 'a``' && ch <= '``z``')``        ``{``            ``ch = String.fromCharCode((65 + parseInt((ch.charCodeAt(0) - '``a``'.charCodeAt(0)))));``        ``}``        ``else if (ch >= '``A``' && ch <= '``Z``')``        ``{``            ``ch = String.fromCharCode((97 + parseInt((ch.charCodeAt(0) - '``A``'.charCodeAt(0)))));``        ``}``        ``temp += ch;``    ``}``    ``return temp;``}``// Function to delete vowels``function delete_vowels(a)``{``    ``var temp = "";``    ``var l = a.length;``    ``for (var i=0; i < l; i++)``    ``{``        ``var ch = a.charAt(i);``        ``// If character is consonant``        ``if (ch != '``a``' && ch != '``e``' && ch != '``i``' && ch != '``o``' && ch != '``u``' && ch != '``A``' && ch != '``E``' && ch != '``O``' && ch != '``U``' && ch != '``I``')``        ``{``            ``temp += ch;``        ``}``    ``}``    ``return temp;``}``// Function to insert "#"``function insert_hash(a)``{``    ``var temp = "";``    ``var l = a.length;``    ``var hash = '``#';``    ``for` `(``var` `i=0; i < l; i++)``    ``{``        ``var` `ch = a.charAt(i);``        ``// If character is not``        ``// special character``        ``if` `((ch >= 'a``' && ch <= '``z``') || (ch >= '``A``' && ch <= '``Z'))``        ``{``            ``temp = temp + hash + ch;``        ``}``        ``else``        ``{``            ``temp = temp + ch;``        ``}``    ``}``    ``return` `temp;``}``// Function to transform string``function` `transformString(a)``{``    ``var` `b = delete_vowels(a);``    ``var` `c = change_case(b);``    ``var` `d = insert_hash(c);``    ``if``(d==``""``)``      ``console.log(``"-1"``);``    ``else``        ``console.log(d);``}``    ` `// Driver function``var` `a = ``"SunshinE!!"``;``var` `b = ``"aeiou"``;``// Calling function``transformString(a);``transformString(b);` `// This code is contributed by Aarti_Rathi`

Output

```#s#N#S#H#N!!
-1```

Time complexity:  O(n),  where n is the length of the string
Auxiliary Space: O(n), where n is the length of the string

My Personal Notes arrow_drop_up