In this post, we will learn how to concatenate two strings using the C Programming language.
Concatenation, in the context of programming, is the process of joining two strings together. For example: two strings hello and world after concatenation becomes helloworld.
We will be writing a manual logic to concatenate two strings.
So, without further ado, let’s begin this tutorial.
C Program to Concatenate Two Strings
// C Program to Concatenate Two Strings
#include <stdio.h>
int main(){
char first[25], second[25];
int i, j;
// Asking for input
printf("Enter the first string: ");
scanf("%s", first);
printf("Enter the second string: ");
scanf("%s", second);
// Concatenating two strings
i = 0;
while (first[i] != '\0'){
i++;
}
for (j = 0; second[j] != '\0'; ++j, ++i){
first[i] = second[j];
}
first[i] = '\0';
// Displaying output
printf("After concatenation: %s", first);
return 0;
}
Output
Enter the first string: Coding
Enter the second string: Broz
After concatenation: CodingBroz
How Does This Program Work ?
char first[25], second[25];
int i, j;
In this program, we have declared some char data type variables and some int data type variables.
// Asking for input
printf("Enter the first string: ");
scanf("%s", first);
printf("Enter the second string: ");
scanf("%s", second);
Then, the user is asked to enter the first and the second string.
i = 0;
while (first[i] != '\0'){
i++;
}
This is used to store the length of the first string in the i variable.
for (j = 0; second[j] != '\0'; ++j, ++i){
first[i] = second[j];
}
This loop statement concatenates the second string at the end of the first string.
// Displaying output
printf("After concatenation: %s", first);
Finally, the string after concatenation is displayed on the screen using printf() function.
Conclusion
I hope after going through this post, you understand how to concatenate two strings using C Programming language.
If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to help you.
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