Question

How do you increment a variable by one in JavaScript?

Question 4 options:

counter++


Both a and c


counter + 1


counter = counter + 1

Answer 1

In JavaScript, you can increment a variable by one using several methods. Among the options you've provided:

1. **counter++** - This is a post-increment operation, which increases the value of `counter` by one.

2. **counter + 1** - This expression adds `1` to the current value of `counter`, but does not change the value of `counter` itself.

3. **counter = counter + 1** - This explicitly assigns the value of `counter` plus one back to `counter`, effectively incrementing it by one.

Based on your options, the correct answers for incrementing a variable by one in JavaScript are:

- **counter++**
- **counter = counter + 1**

So the answer would be **Both a and c.**