# FAQ: Using Number Variables - Increment and Decrement Operators

This community-built FAQ covers the “Increment and Decrement Operators” exercise from the lesson “Using Number Variables”.

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This exercise can be found in the following Codecademy content:

## FAQs on the exercise Increment and Decrement Operators

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Increment and Decrement Operators - Step 5
A single line comment must be used for each variable to pass this step.
Below is what worked for me.

``````var a = 5
a += 6 // a: 11

var b = a * 9 // b: 99
var c = b / 3 // b: 33
c++ // c: 34

var d = c + 8 // d: 42
d %= 4  // d: 2
d--  // d: 1
// d: 0
``````

var d = c + 8 // d: 42
d %= 4 // d: 2
d-- // d: 1
How?