Before you use a variable in a JavaScript program,you should ____ it.
A) compile
B) concatenate
C) declare
D) nullify

Name: Before you use a variable in a JavaScript program,you should ____ it. A) compile B) concatenate C) declare D) nullify
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Before using a variable in a JavaScript program, you must declare it using the var keyword to let JavaScript know that a variable with a given name exists and to allocate memory for it. This enables you to store values in the variable and manipulate them later.

Before You Use a Variable in a JavaScript Program,you Should