package operator

import "fmt"

// Add returns the sum of a and b.
func Add(a, b int) int {
    return a + b
}

// Sub returns the difference a - b.
func Sub(a, b int) int {
    return a - b
}

// Mul returns the product of a and b.
func Mul(a, b int) int {
    return a * b
}

// Div returns the division a / b as float64. Returns an error on division by zero.
func Div(a, b int) (float64, error) {
    if b == 0 {
        return 0, fmt.Errorf("divide by zero")
    }
    return float64(a) / float64(b), nil
}