JavaScript Arithmetic

js 算式

+加法

exp-1

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let x = 100 + 50;
console.log('x=', x) // x= 150

exp-2

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let a = 100;
let b = 50;
let x = a + b;
console.log('x=', x) // x= 150

exp-3

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let a = 3;
let x = (100 + 50) * a;
console.log('x=', x) // x=450

- 減法 Subtracting

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let x = 5;
let y = 2;
let z = x - y;
console.log(' z=',  z) //z=3

* 乘法 Multiplying

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let x = 5;
let y = 2;
let z = x * y;
console.log(' z=',  z) // z= 10

/ 除法 Dividing

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let x = 5;
let y = 2;
let z = x / y;
console.log(' z=',  z) // z= 2.5

餘數Remainder

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let x = 5;
let y = 2;
let z = x % y;
console.log(' z=',  z) // z=1

遞增 Incrementing

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let x = 5;
x++;
let z = x;
console.log(' z=',  z) // z= 6

遞減 Decrementing

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let x = 5;
x--;
let z = x;
console.log(' z=',  z) // z= 4

指數運算 Exponentiation

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let x = 5;
let z = x ** 2;
console.log(' z=',  z)  // z= 25

Math.pow(基底數, 指數)

Math.pow(base, exponent)

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let x = 5;
let z = Math.pow(x,2);
console.log(' z=',  z)