Variables Easy Questions and Answers

Comment on the output of the following C code.

#include <stdio.h>
    int main()
    {
        int k;
        for (k = 0; k < 10; k++)
        int m = k;
        printf("%d", m);
    }

Syntax error in declaration of m

What is the scope of a function?

From the point of declaration to the end of the file being compiled

What is the scope of an external variable?

From the point of declaration to the end of the file being compiled

What will be the output of the following C code?

#include <stdio.h>
    int *ptr;
    int main()
    {
        if (ptr == NULL)
            printf("Right\n");
        return 0;
    }

Right

What will be the output of the following C code?

#include <stdio.h>
    int *p;
    int main()
    {
        if (p == 0)
            printf("Hey\n");
        return 0;
    }

Hey only if NULL value is 0

Variables