chap02.js

function Calc1(){
	output(add(3,2));
	output(sub(5,8));
	output(mul(3,4));
	output(div(7,3));
}

function add(num1,num2){
	return [
		"加算の結果は"
		, num1 + num2
		,"です"
	].join("");
}

function sub(num1,num2){
	return [
		"減算の結果は"
		, num1 - num2
		,"です";
	].join("")
}

function mul(num1,num2){
	return [
		"乗算の結果は"
		, num1 * num2
		,"です";
	].join("")
}

function div(num1,num2){
	return [
		"除算の結果は"
		, num1 / num2
		,"です"
	].join("");
}

function Calc2(){
	output(1 + (2 * 3) - (4 / 2));
}