C Program to Concatenate two Strings without using Strcat

C program to concatenate two strings without using strcat.

In this article, you will learn to concatenate the two strings without using the strcat function, In this I will use the while loop and for loop to write this program.

Example

You should know about the following topics in C programming to understand this program:

• C For Loop
• C While Loop

Source

// C Program to Concatenate two Strings without using Strcat
#include <stdio.h>

// It's the main function of the program
int main() {
    char string_1[500] = "hello this is ";
    char string_2[500] = "my first program";
    int lenth_1;

    // Step-1 Get the length of the first string
    while (string_1[lenth_1] != '\0') {
        lenth_1++;
    }

    // Step-2 Concatenate string_2 to string_1
    for (int i = 0; string_2[i] != '\0'; i++, lenth_1++) {
        string_1[lenth_1] = string_2[i];
    }

    // Step-3 Terminate the first string string_1
    string_1[lenth_1] = '\0';

    // Step-3 Final output of the program
    printf("Concatenation result: ");
    puts(string_1);
    return 0;
}

Run

Output