C Academy · Lesson

Arithmetic Operators

+, -, *, /, %.

Arithmetic in C

C gives you the everyday math operators you already know. They let you turn variables into expressions that compute new values.

#include <stdio.h>
int main(void) {
    int a = 7, b = 3;
    printf("a + b = %d\n", a + b);
    printf("a - b = %d\n", a - b);
    return 0;
}

The * operator multiplies two values. The result type follows the operands, so two int values produce an int.

#include <stdio.h>
int main(void) {
    int width = 4, height = 5;
    int area = width * height;
    printf("Area = %d\n", area);
    return 0;
}