operator01/index.js

math operator method add, minuts, multi, divide

/**
 * Created by HP on 2020/6/8.
 */
var add = function(num1,num2){
    return num1+num2;
};

var minu = function(num1,num2){
    return num1-num2;
};

var multi = function(num1,num2){
    return num1*num2;
};

var div = function(num1,num2){
    if(num2==0)
        return 'error';
    else
        return num1/num2;
};

module.exports = {
    add : add,
    minu : minu,
    multi : multi,
    div : div
};