Concatenate given strings using C language.

#include<stdio.h>
#include<string.h>
void main()
{
    char arr1[100], arr2[100];
    printf("Enter first string: ");
    gets(arr1);
    printf("Enter second string: ");
    gets(arr2);
    printf("Concatenate of two string %s",strcat(arr1,arr2));
}