arithmetic-operators.md

Arithmetic operators

We have use literal values for int, float, double and char.

We can declare and initialise variables on a single line, separated by a comma.

double x =5.2, y = 2.5;

Common operators

double multiple = x * y;
double addition = x + y;
double division = x / y;
double subtraction = x - y;

modulus operator %

int x = 11, y = 3;

int div = x / y;

printf("div: %d\n", div);

3 goes into 11, 3 times. With a remainder of 2.

Expected output:

div: 3

Modulus % operator returns the remainder which is 2.

int x = 11, y = 3;

int mod = x % y;

#include <stdio.h>

int main(void)
{

    int x = 11, y = 3;

    int div = x / y;
    int mod = x % y;

    printf("div: %d\n", div);
    printf("mod: %d\n", mod);

    return 0;

}

Expected output:

div: 3
mod: 2

This can be used to determine if a number is either odd or even.

    int x = 11;

    int mod = x % 2;

If mod = 1, x is a odd number.

    int x = 12;

    int mod = x % 2;

If mod = 0, x is a even number.

#include <stdio.h>

int main(void)
{

    int x = 14;

    int mod = x % 2;

    printf("mod: %d\n", mod);

    return 0;

}

Expected output:

mod: 0