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.

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.

Note: Macro parameters are always local to the macro that defines them. You cannot make macro parameters global. (Although, you can assign the value of the parameter to a global variable; see ...

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My question is simple. Is a static local variable's initialization thread safe? Acording to Stroustrup: quote: (A Static Local Variable) will be initialized only the first time the thread of ...

At least, that's the case if you're talking about local static variables. In C, static variables appear within local procedures, just like other local variables, but they have lifetimes that span the ...