Don't forget that while you can't redeclare variables using let, you can reassign them.
let a = 42; console.log(a); // 42 let a = 24; // SyntaxError: redeclaration of let a a = 24; console.log(a) // 24
If you want a var that can not be reassigned, use const instead of let.
const c = 43; console.log(c) // 43 c = 51; // TypeError: invalid assignment to const `c'
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Don't forget that while you can't redeclare variables using let, you can reassign them.
If you want a var that can not be reassigned, use const instead of let.