#JavaScript

var, const, let

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if(true){
    var i = 1;
    const b = 1;
}
console.log(i);
console.log(b);

Uncaught ReferenceError: b is not defined
    at <anonymous>:7:13
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const p = 0;

p = 1;

VM130:1 Uncaught TypeError: Assignment to constant variable.
    at <anonymous>:1:3

let i = 0;
i = 3;
#JavaScript