# Find the Nth occurrence of a character in the given String

Given a string str, a character ch and a value N, the task is to find the index of Nth occurrence of the given character in the given string. Print -1 if no such occurrence exists.

Examples:

Input: str = “Geeks”, ch = ‘e’, N = 2
Output: 2

Input: str = “GFG”, ch = ‘e’, N = 2
Output: -1

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach:

• Traverse the string character by character.
• Check for each character if it matches with the given character.
• Increment the count by 1, if it matches with the given character.
• If the count becomes equal to N, return the latest found index
• If count does not matches with N after the traversal, return -1

Below is the implementation of the above approach:

## C++

 `// C++ implemenation to find the ` `// Nth occurrence of a character ` ` `  `#include ` `using` `namespace` `std; ` ` `  `// Function to find the ` `// Nth occurrence of a character ` `int` `findNthOccur(string str, ` `                 ``char` `ch, ``int` `N) ` `{ ` `    ``int` `occur = 0; ` ` `  `    ``// Loop to find the Nth ` `    ``// occurence of the character ` `    ``for` `(``int` `i = 0; i < str.length(); i++) { ` `        ``if` `(str[i] == ch) { ` `            ``occur += 1; ` `        ``} ` `        ``if` `(occur == N) ` `            ``return` `i; ` `    ``} ` `    ``return` `-1; ` `} ` ` `  `// Driver Code ` `int` `main() ` `{ ` `    ``string str = ``"geeks"``; ` `    ``char` `ch = ``'e'``; ` `    ``int` `N = 2; ` `    ``cout << findNthOccur(str, ch, N); ` `} `

## Java

 `// Java implemenation to find the ` `// Nth occurrence of a character ` `import` `java.util.*; ` ` `  `class` `GFG ` `{ ` ` `  `// Function to find the ` `// Nth occurrence of a character ` `static` `int` `findNthOccur(String str, ` `                    ``char` `ch, ``int` `N) ` `{ ` `    ``int` `occur = ``0``; ` ` `  `    ``// Loop to find the Nth ` `    ``// occurence of the character ` `    ``for` `(``int` `i = ``0``; i < str.length(); i++)  ` `    ``{ ` `        ``if` `(str.charAt(i) == ch) ` `        ``{ ` `            ``occur += ``1``; ` `        ``} ` `        ``if` `(occur == N) ` `            ``return` `i; ` `    ``} ` `    ``return` `-``1``; ` `} ` ` `  `// Driver Code ` `public` `static` `void` `main(String[] args) ` `{ ` `    ``String str = ``"geeks"``; ` `    ``char` `ch = ``'e'``; ` `    ``int` `N = ``2``; ` `    ``System.out.print(findNthOccur(str, ch, N)); ` `} ` `} ` ` `  `// This code is contributed by 29AjayKumar `

## Python3

 `# Python3 implemenation to find the  ` `# Nth occurrence of a character  ` ` `  `# Function to find the  ` `# Nth occurrence of a character  ` `def` `findNthOccur(string , ch, N) : ` `    ``occur ``=` `0``;  ` ` `  `    ``# Loop to find the Nth  ` `    ``# occurence of the character  ` `    ``for` `i ``in` `range``(``len``(string)) : ` `        ``if` `(string[i] ``=``=` `ch) : ` `            ``occur ``+``=` `1``;  ` ` `  `        ``if` `(occur ``=``=` `N) : ` `            ``return` `i;  ` `     `  `    ``return` `-``1``;  ` ` `  `# Driver Code  ` `if` `__name__ ``=``=` `"__main__"` `:  ` ` `  `    ``string ``=` `"geeks"``;  ` `    ``ch ``=` `'e'``;  ` `    ``N ``=` `2``;  ` `    ``print``(findNthOccur(string, ch, N));  ` ` `  `# This code is contributed by AnkitRai01 `

## C#

 `// C# implemenation to find the ` `// Nth occurrence of a character ` `using` `System; ` ` `  `class` `GFG ` `{ ` ` `  `// Function to find the ` `// Nth occurrence of a character ` `static` `int` `findNthOccur(String str, ` `                    ``char` `ch, ``int` `N) ` `{ ` `    ``int` `occur = 0; ` ` `  `    ``// Loop to find the Nth ` `    ``// occurence of the character ` `    ``for` `(``int` `i = 0; i < str.Length; i++)  ` `    ``{ ` `        ``if` `(str[i] == ch) ` `        ``{ ` `            ``occur += 1; ` `        ``} ` `        ``if` `(occur == N) ` `            ``return` `i; ` `    ``} ` `    ``return` `-1; ` `} ` ` `  `// Driver Code ` `public` `static` `void` `Main(String[] args) ` `{ ` `    ``String str = ``"geeks"``; ` `    ``char` `ch = ``'e'``; ` `    ``int` `N = 2; ` `    ``Console.Write(findNthOccur(str, ch, N)); ` `} ` `} ` ` `  `// This code is contributed by PrinciRaj1992 `

Output:

```2
```

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