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# Convert a sentence into its equivalent mobile numeric keypad sequence

Given a sentence in the form of a string, convert it into its equivalent mobile numeric keypad sequence.

Examples :

Input: GEEKSFORGEEKS
Output: 4333355777733366677743333557777
Explanation: For obtaining a number, we need to press a number corresponding to that character for a number of times equal to the position of the character. For example, for character E, press number 3 two times and accordingly.

Input : HELLO WORLD
Output : 4433555555666096667775553

Approach: Follow the steps given below to convert a sentence into its equivalent mobile numeric keypad sequence.

• For each character, store the sequence which should be obtained at its respective position in an array, i.e. for Z, store 9999. For Y, store 999. For K, store 55 and so on.
• For each character, subtract ASCII value of ‘A’ and obtain the position in the array pointed
by that character and add the sequence stored in that array to a string.
• If the character is a space, store 0
• Print the overall sequence.

Below is the implementation of above method :

## C++

```// C++ implementation to convert a
// sentence into its equivalent
#include <bits/stdc++.h>
using namespace std;

// Function which computes the sequence
string printSequence(string arr[], string input)
{
string output = "";

// length of input string
int n = input.length();
for (int i = 0; i < n; i++) {
// Checking for space
if (input[i] == ' ')
output = output + "0";

else {
// Calculating index for each
// character
int position = input[i] - 'A';
output = output + arr[position];
}
}

// Output sequence
return output;
}

// Driver Code
int main()
{
// storing the sequence in array
string str[]
= { "2",   "22",  "222", "3",   "33",   "333", "4",
"44",  "444", "5",   "55",  "555",  "6",   "66",
"666", "7",   "77",  "777", "7777", "8",   "88",
"888", "9",   "99",  "999", "9999" };

string input = "GEEKSFORGEEKS";
cout << printSequence(str, input);
return 0;
}```

## Java

```// Java implementation to convert a
// sentence into its equivalent
import java.util.*;

class GFG {

// Function which computes the sequence
static String printSequence(String arr[], String input)
{
String output = "";

// length of input string
int n = input.length();
for (int i = 0; i < n; i++) {
// Checking for space
if (input.charAt(i) == ' ')
output = output + "0";

else {
// Calculating index for each
// character
int position = input.charAt(i) - 'A';
output = output + arr[position];
}
}

// Output sequence
return output;
}

// Driver Code
public static void main(String[] args)
{
// storing the sequence in array
String str[]
= { "2",    "22",  "222", "3",   "33", "333",
"4",    "44",  "444", "5",   "55", "555",
"6",    "66",  "666", "7",   "77", "777",
"7777", "8",   "88",  "888", "9",  "99",
"999",  "9999" };

String input = "GEEKSFORGEEKS";
System.out.println(printSequence(str, input));
}
}

// This code is contributed by Gitanjali.```

## Python3

```# Python3 implementation to convert
# a sentence into its equivalent

# Function which computes the
# sequence

def printSequence(arr, input):

# length of input string
n = len(input)
output = ""

for i in range(n):

# checking for space
if(input[i] == ' '):
output = output + "0"
else:
# calculating index for each
# character
position = ord(input[i]) - ord('A')
output = output + arr[position]
# output sequence
return output

# Driver code
str = ["2", "22", "222",
"3", "33", "333",
"4", "44", "444",
"5", "55", "555",
"6", "66", "666",
"7", "77", "777", "7777",
"8", "88", "888",
"9", "99", "999", "9999"]

input = "GEEKSFORGEEKS"
print(printSequence(str, input))

# This code is contributed by upendra bartwal
```

## C#

```// C# implementation to convert a
// sentence into its equivalent
using System;

class GFG {

// Function which computes the sequence
static String printSequence(string[] arr, string input)
{
string output = "";

// length of input string
int n = input.Length;
for (int i = 0; i < n; i++) {
// Checking for space
if (input[i] == ' ')
output = output + "0";

else {
// Calculating index for each
// character
int position = input[i] - 'A';
output = output + arr[position];
}
}

// Output sequence
return output;
}

// Driver Code
public static void Main()
{
// storing the sequence in array
string[] str
= { "2",    "22",  "222", "3",   "33", "333",
"4",    "44",  "444", "5",   "55", "555",
"6",    "66",  "666", "7",   "77", "777",
"7777", "8",   "88",  "888", "9",  "99",
"999",  "9999" };

string input = "GEEKSFORGEEKS";
Console.WriteLine(printSequence(str, input));
}
}

// This code is contributed by vt_m.```

## PHP

```<?php
// PHP implementation to convert a
// sentence into its equivalent

// Function which computes the sequence
function printSequence(&\$arr, \$input)
{
\$output = "";

// length of input string
\$n = strlen(\$input);
for (\$i = 0; \$i < \$n; \$i++)
{
// Checking for space
if (\$input[\$i] == ' ')
\$output = \$output + "0";

else
{
// Calculating index for each
// character
\$position = ord(\$input[\$i]) - ord('A');
\$output = \$output . \$arr[\$position];
}
}

// Output sequence
return \$output;
}

// Driver Code

// storing the sequence in array
\$str = array("2","22","222", "3","33","333",
"4","44","444", "5","55","555",
"6","66","666", "7","77","777","7777",
"8","88","888", "9","99","999","9999");

\$input = "GEEKSFORGEEKS";
echo printSequence(\$str, \$input);

// This code is contributed by ita_c
?>```

## Javascript

```<script>

// Javascript implementation to convert a
// sentence into its equivalent

// Function which computes the sequence
function printSequence(arr,input)
{
let output = "";

// length of input string
let n = input.length;
for (let i = 0; i < n; i++)
{
// Checking for space
if (input[i] == ' ')
output = output + "0".charCodeAt(0);

else
{
// Calculating index for each
// character
let position = input[i].charCodeAt(0) - 'A'.charCodeAt(0);
output = output + arr[position];
}
}

// Output sequence
return output;
}

// Driver Function
let str = ["2", "22", "222",
"3", "33", "333",
"4", "44", "444",
"5", "55", "555",
"6", "66", "666",
"7", "77", "777", "7777",
"8", "88", "888",
"9", "99", "999", "9999" ]

let input = "GEEKSFORGEEKS";
document.write(printSequence(str, input));

// This code is contributed by avanitrachhadiya2155
</script>```
Output

`4333355777733366677743333557777`

Time complexity: O(N), For traversing the string
Auxiliary Space: O(N), For storing the answer.

My Personal Notes arrow_drop_up