How to Append a Character to a String in C

Given a string str and a character ch, this article tells about how to append this character ch to this string str at the end.

Examples:

Input: str = "Geek", ch = 's'
Output: "Geeks"

Input: str = "skee", ch = 'G'
Output: "skeeG"

Approach:



  1. Get the string str and character ch
  2. Use the strncat() function to append the character ch at the end of str. strncat() is a predefined function used for string handling. string.h is the header file required for string functions.

    Syntax:

    char *strncat(char *dest, const char *src, size_t n)

    Parameters: This method accepts the following parameters:

    • dest: the string where we want to append.
    • src: the string from which ‘n’ characters are going to append.
    • n: represents the maximum number of character to be appended. size_t is an unsigned integral type.
  3. Print or return the appended string str.

Below is the implementation of the above approach:

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// C program to Append a Character to a String
  
#include <stdio.h>
#include <string.h>
  
int main()
{
    // declare and initialize string
    char str[] = "Geek";
  
    // declare and initialize char
    char ch = 's';
  
    // print string
    printf("Original String: %s\n", str);
    printf("Character to be appended: %c\n", ch);
  
    // append ch to str
    strncat(str, &ch, 1);
  
    // print string
    printf("Appended String: %s\n", str);
  
    return 0;
}

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Output:

Original String: Geek
Character to be appended: s
Appended String: Geeks


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