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CodeHS Glossary

Declare a Variable JavaScript

Declaring a variable is defining it for the first time. When declaring a variable in Javascript, you use `var` in front. ---------- For example, this creates a variable named `numApples` that has no value yet. var numApples; Later, you can **initialize** it by typing numApples = 2; which sets the value of `numApples`. ---------- This declares **and** initializes a variable `numOranges` with a starting value of `4`. var numOranges = 4; ---------- Declaring is different from updating the value of a variable. Here's an example: var points = 5; // declares the points variable and sets its value to 5 points = 10; // updates the value of the points variable to 10