VAR, LET and CONST are keywords in javascript. Can we reassign a new value to a variable declared by using LET keyword? This example shows that. It can be a javascript interview question. In it we also talk about a shorthand in it.
Consider
let a = 2;
let b = 4;
let c = a + b;
a;
value of ‘a’ here will be ‘2’.
But
let a = 2;
let b = 4;
let c = a += b;
In this case what will be value of ‘a’?
its ‘6’.
This is because
a += b is a shorthand for a = a + b
Because we can reassign a value to a variable declared by using let keyword. A new value a+b was assigned to variable a, so the value of variable ‘a’ changed.
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