The variable i is declared using the let keyword. This ensures it is a local variable. Initially, its value is undefined, before the for loop assigns and modifies its value.

Scope in JavaScript refers to context (or portion) of the code which determines the accessibility (visibility) of variables. In JavaScript, we have two types of scope, local , and global.

Global variables are initialized to values that are determined at compile-time. Generally this means you can't initialize a global to the result of a function call.<BR><BR>Instead, declare it as ...

Local variables A local variable is declared within one specific sub-program of a larger main program. During the execution of this sub-program, the values of local variables will be held in RAM.