**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 to `a = a + 1` or `a += 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 to `a = a - 1` or `a -= 1`.

Increment and decrement operations are frequently used in loops, which we will discuss in more detail later.

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Introduction to JavaScript

Increment and Decrement

Increment

Decrement

Introduction to JavaScript

Increment and Decrement

Increment

Decrement