Character Array MCQ 9 : Printing String inside If Statement

Character Array MCQ 9 : Printing String inside If Statement

What is the Output of the Following Program ?

#include<stdio.h>
#include<string.h>
void main()
{
char str[]="\0";
 if(printf("%s",str))
   printf("Non Empty String");
 else
   printf("Empty String");
}

Options :

1. \0Non Empty String
2. Non Empty String
3. Empty String
4. \0Empty String

Output:

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How and Why ?

• ‘\0′ is Non Printable Character.

printf("%s",str)

• Above Printf Prints “Nothing“.
• So Printf Returns 0 [ As No Character is Printed On Screen ]

if(0)

• Zero Inside If Statement Indicates “False Condition“.