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$ curl repovive.com/roadmaps/javascript/operators-expressions/increment-and-decrement

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$ curl repovive.com/roadmaps/javascript/operators-expressions/increment-and-decrement

Repovive

Increment and Decrement - Operators & Expressions | JavaScript | Repovive

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JavaScript22 sections · 783 units18h total

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Increment and Decrement

Adding/subtracting one

Use ++ to add $1$ and -- to subtract $1$ :

let count = 5
count++   // count is now 6
count--   // count is now 5 again

These are shortcuts for count += 1 and count -= 1. You'll use them constantly in loops:

for (let i = 0; i < 10; i++) {
  console.log(i)
}

The i++ in the loop header increments i after each iteration.