js hoisting
/*Hoisting is JavaScript's default behavior of moving
all declarations to the top of the current scope (script or function).
Be carefull that only declaration gets hoisted NOT the initialitations*/
var x = 5;
alert("x is = "+x+". y is = "+y);//result => x is = 5. y is = undefined.
var y = 7;
/*
note that the code doesn't produce the error "y is not defined" like
it would if we would omit y. It executes but not in the way you would want.
*/hoisting
// Variable lifecycle
let a; // Declaration
a = 100; // Assignment
console.log(a); // UsageCopyright © 2021 Codeinu
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