C Booleans & If...Else

Make decisions in C.

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C uses integers for truth values: 0 is false, anything else is true. Include <stdbool.h> to use bool, true and false.

if (cond) { } else if (cond2) { } else { }
Ternary: max = (a > b) ? a : b;

Key Takeaways: C Booleans & If...Else

Mastering C Booleans & If...Else helps you write clean and reliable C code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

C Booleans & If...Else Code Example

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

int main() {
    int temp = 31;
    bool isSunny = true;

    if (temp > 35) {
        printf("Very hot\n");
    } else if (temp > 25) {
        printf("Warm\n");
    } else {
        printf("Cool\n");
    }

    if (isSunny) printf("Take sunglasses\n");

    int a = 8, b = 12;
    printf("Max: %d\n", a > b ? a : b);
    return 0;
}

Output