Question

How to toggle a boolean in C

Answer 1

#include <stdio.h>
#include <stdbool.h>

int main(void) {
    bool x = true;
    printf("%s\n", x ? "true" : "false");
    
    x = !x;
    printf("%s\n", x ? "true" : "false");
    
    x = !x;
    printf("%s\n", x ? "true" : "false");
    
    x = !x;
    printf("%s\n", x ? "true" : "false");
    
    return 0;
}


   
   
   
/*
run:
 
true
false
true
false
   
*/

 

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Answer 2

#include <stdio.h>
#include <stdbool.h>

int main(void) {
    printf("%s\n", !true ? "true" : "false");
    
    printf("%s\n", !false ? "true" : "false");
    
    return 0;
}


   
   
   
/*
run:
 
false
true
   
*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile