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Introduction to JavaScript

bookIncrement and Decrement Operators

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:


              
1234567

            
let a = 0;
a++;
console.log(a);
a++;
console.log(a);
a++;
console.log(a);
copy

Note

The expression a++ is equivalent to a = a + 1 or a += 1.

Decrement

The decrement operation is performed using the -- operator:


              
1234567

            
let a = 5;
a--;
console.log(a);
a--;
console.log(a);
a--;
console.log(a);
copy

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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Seção 3. Capítulo 4

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bookIncrement and Decrement Operators

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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:


              
1234567

            
let a = 0;
a++;
console.log(a);
a++;
console.log(a);
a++;
console.log(a);
copy

Note

The expression a++ is equivalent to a = a + 1 or a += 1.

Decrement

The decrement operation is performed using the -- operator:


              
1234567

            
let a = 5;
a--;
console.log(a);
a--;
console.log(a);
a--;
console.log(a);
copy

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.

question mark

Choose the correct result:

Select the correct answer

Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Seção 3. Capítulo 4
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