JavaScript 算术运算符包括加法、减法、乘法、除法和模运算符等。所有这些运算符都是二元运算符，这意味着它们作用于两个操作数。下表显示了带有示例的算术运算符。
| 算术运算符 | 运算 | 示例 |
|---|---|---|
| + | 加法 | 10 + 2 = 12 |
| – | 减法 | 10 – 2 = 8 |
| * | 乘法 | 10 * 2 = 20 |
| / | 除法 | 10 / 2 = 5 |
| % | 取模 – 返回除法运算后的余数 | 10 % 2 = 0 （此处余数为零）。如果为 10 % 3，则结果为 1。 |
JavaScript 算术运算符示例
在此算术运算符示例中，我们使用了两个变量 a 和 b，它们的值分别为 12 和 3。我们将使用这两个变量来执行各种算术运算。
<!DOCTYPE html>
<html>
<head>
<title>JavascriptArithmeticOperators </title>
</head>
<body>
<h1>PerformingArithmeticOperations </h1>
<script>
var a = 12, b = 3;
var addition, subtraction, multiplication, division, modulus;
addition = a + b; //addition of 3 and 12
subtraction = a - b; //subtract 3 from 12
multiplication = a * b; //Multiplying both
division = a / b; //dividing 12 by 3 (number of times)
modulus = a % b; //calculation the remainder
document.write("Addition of " +a +' and ' +b +" is = " + addition + "<br />");
document.write("Subtraction of " +a +' and ' +b +" is = " + subtraction + "<br />");
document.write("Multiplication of " +a +' and ' +b +" is = " + multiplication + "<br />");
document.write("Division of " +a +' and ' +b +" is = " + division + "<br />");
document.write("Modulus of " +a +' and ' +b +" is = " + modulus + "<br />");
</script>
</body>
</html>
Performing Arithmetic Operations
Addition of 12 and 3 is = 15
Subtraction of 12 and 3 is = 9
Multiplication of 12 and 3 is = 36
Division of 12 and 3 is = 4
Modulus of 12 and 3 is = 0算术运算符示例 2
在此 JavaScript 示例中，我们也使用了两个变量 a 和 b，它们的值分别为 12 和 3。在这里，我们将使用这些变量向您展示如何将算术运算的输出显示在段落中。
<!DOCTYPE html>
<html>
<head>
<title>JavascriptArithmeticOperators 2</title>
</head>
<body>
<h1>Performing Arithmetic Operations </h1>
<p id = 'add'> Addition </p>
<p id = 'sub'> Subtraction </p>
<p id = 'mul'> Multiplication </p>
<p id = 'div'> Division </p>
<p id = 'mod'> Modulus </p>
<script>
var a = 12, b = 3;
var add, sub, mul, div, mod;
add = a+b; //addition of 3 and 12
sub = a-b; //subtract 3 from 12
mul = a*b; //Multiplying both
div = a/b; //dividing 12 by 3 (number of times)
mod = a%b; //calculation the remainder
document.getElementById("add").innerHTML = "Addition of " +a +' and ' +b +" is = " + add;
document.getElementById("sub").innerHTML = "Subtraction of " +a +' and ' +b +" is = " + sub;
document.getElementById("mul").innerHTML = "Multiplication of " +a +' and ' +b +" is = "+ mul;
document.getElementById("div").innerHTML = "Division of " +a +' and ' +b +" is = " + div;
document.getElementById("mod").innerHTML = "Modulus of " +a +' and ' +b +" is = " + mod;
</script>
</body>
</html>
