what is the different between let and var ?
to truly understand the difference, we need to look at var, let and const
both let and const where introduced in es6, allowing block scope. var has a functional local scope or global scope, let me show you what i mean:
if true:
var global_scope = "hello world"
let block_scope = "hello world"
console.log(global_scope) // outputs: hello world
console.log(block_scope) // throws error
block_scope only exist within the if clause/block.
what is the difference between const and let? a constant variable can’t be re-assigned:
const constant_variable = "hello world"
constant_variable = "this will throw an error"
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Thanks.
That helped a lot for me
