04. Operators & Expressions

Arithmetic, comparison, logical — dry-run style labs

Goals:

+ - * / %
Comparison se 0/1
Logical soch

1. Arithmetic

/ integers me floor division jaisa behave karta hai: 10/3 → 3 (fraction discard).
% remainder: 10%3 → 1.

Live practice 1 — Math operators

Har line ka output predict karke Run se verify karo.

#include <cstdio>

int main() {
    int a = 10, b = 3;
    printf("a+b = %d\n", a + b);
    printf("a-b = %d\n", a - b);
    printf("a*b = %d\n", a * b);
    printf("a/b = %d\n", a / b);
    printf("a%%b = %d\n", a % b);
    return 0;
}

2. Comparison

C me condition ka result number hota hai: true ≈ non-zero (aksar 1), false = 0.

Live practice 2 — Compare

True/false numbers me dekho.

#include <cstdio>

int main() {
    printf("5 > 3 → %d\n", 5 > 3);
    printf("5 == 5 → %d\n", 5 == 5);
    printf("5 != 2 → %d\n", 5 != 2);
    printf("10 <= 9 → %d\n", 10 <= 9);
    return 0;
}

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