A variable must be defined
A) in every program.
B) and initialized at the same time.
C) in order to perform output.
D) before it can be used.
E) in all of the above cases.

Question

Quizplus · Accepted Answer

Variables must be defined before they can be used in a program. This means that the programmer must specify what the variable is (e.g. its data type and name) before the program can use it to store or manipulate data. Initialization is not always necessary, although it is often a good practice to initialize variables to some default value before using them. Output also does not require variable definition, although it may involve using previously defined variables. Therefore, the correct answer is D.

A Variable Must Be Defined