It is not considered good programming practice to declare all your variables globally.

Name: It is not considered good programming practice to declare all your variables globally.
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Question

Quizplus · Accepted Answer

Declaring variables globally can lead to naming conflicts and can make it difficult to track down where variables are being used and modified. It is better to only declare variables where they are needed and limit their scope to the smallest possible area.

It Is Not Considered Good Programming Practice to Declare All