Question

How to check if a character array is empty in C

Answer 1

#include <stdio.h>
#include <string.h>

int main() {
    char str[32] = "";
    
    if (strlen(str) == 0) {
        puts("Empty");          
    } else {
        puts("Not Empty");     
    }
    
    return 0;
}
  
  
  
/*
run:
  
Empty
  
*/

 

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Answer 2

#include <stdio.h>
#include <string.h>

int main() {
    char str[32] = "";
    
    if (strcmp(str, "") == 0) {
        puts("Empty");          
    } else {
        puts("Not Empty");     
    }
    
    return 0;
}
  
  
  
/*
run:
  
Empty
  
*/

 

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Answer 3

#include <stdio.h>
#include <string.h>

int main() {
    char str[32] = "";
    
    if (str[0] == '\0')  {
        puts("Empty");          
    } else {
        puts("Not Empty");     
    }
    
    return 0;
}
  
  
  
/*
run:
  
Empty
  
*/

 

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