what is the use of let command
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let allows you to declare variables that are limited to the scope of a block statement, or expression on which it is used, unlike the var keyword, which declares a variable globally, or locally to an entire function regardless of block scope.
LET Statement. One of the more useful BASIC language keywords is LET. It is an instruc-tion to the computer to either assign a specified value to a variable name, or to do certain computations and then assign the result to a variable name.
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