Course Content
Introduction to JavaScript
Introduction to JavaScript
Increment and Decrement
Increment and Decrement are operations used to increase or decrease a variable's value by 1
.
Increment
The increment operation is performed using the ++
operator:
let a = 0; a++; console.log(a); a++; console.log(a); a++; console.log(a);
Note
The expression
a++
is equivalent toa = a + 1
ora += 1
.
Decrement
The decrement operation is performed using the --
operator:
let a = 5; a--; console.log(a); a--; console.log(a); a--; console.log(a);
Note
The expression
a--
is equivalent toa = a - 1
ora -= 1
.
Increment and decrement operations are frequently used in loops, which we will discuss in more detail later.
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