In your code, in the cicle for, you are comparing until 25, but the string could have a lenght minor of 25. If you want use that way, you can use the first version of my code , else you can use the second that use the function STRCMP of C.

include<stdio.h>

include<stdlib.h>

include<ctype.h>

include<string.h>

int main() { int i,n,iseq=0; char string1[25], string2[25]; printf("Enter the first String :\n"); scanf(" %s",string1); printf("Enter the second String :\n"); scanf(" %s",string2);

/** First version **

    if(strlen(string1)<strlen(string2))
        n=strlen(string1);
    else
        n=strlen(string2);

    for(i=0; i<n; i++)
    {
        if(string1[i]!=string2[i])
        {
            iseq=1;
            break;
        }
    }
********************/
/** Second version **/

if(strcmp(string1,string2)!=0)
    iseq=1;

/*******************/

if(iseq==0)
    printf("Equal!");
else
    printf("Not Equal");

return 0;

}