The output for this program is showing wrong, but in turbo C it shows correct output.

Question

#include <stdio.h>

int main()
{
    int num,i,j;
    scanf("%d",&num);
    for(i=1;i<=num;i++)
    {
        for(j=1;i<=num;j++)
        {
            if(i==1 || j==1 || i==num || j==num)
            printf("*");
            else
            printf(" ");
        }
        printf("\n");
    }

    return 0;
}

Answer 1

Perhaps you made a typo at the second for loop, it should be 'for(j=1;j<=num;j++)' I think.

Have a look below:

https://onlinegdb.com/DvNwva24H

This works fine for me after fixing the issue.

Answer 2

your second loop of j is wrong, it should be

for(j=1;j<=num;j++)

Answer 3

#include <stdio.h>

int main()
{
    int num,i,j;
    scanf("%d",&num);
    for(i=1;i<=num;i++)
    {
        for(j=1;i<=num;j++)
        {
            if(i==1 || j==1 || i==num || j==num)
            printf("*");
            else
            printf(" ");
        }
        printf("\n");
    }

    return 0;
}

Answer 4

The issue in the nested for loop for variable j. You are using the condition i <= num instead of j <= num. This causes the inner loop to behave incorrectly, leading to unexpected output.

the corrected version:

#include <stdio.h>

int main()
{
    int num, i, j;
    scanf("%d", &num);
    for (i = 1; i <= num; i++)
    {
        for (j = 1; j <= num; j++)  // Corrected condition here
        {
            if (i == 1  j == 1  i == num || j == num)
                printf("*");
            else
                printf(" ");
        }
        printf("\n");
    }

    return 0;
}