var or const in javascript
const age; // errror as const cannot be kept un-initialized;
const age = 20 ;
const age = 21 , // error as once declared const variable cann't be
// re-declared in same scope or different scope.
4.14
7
// var declares a variable, meaning its value will vary.
// const declares a constant, meaning its value will remain
// consistant and not change.
// If your variable changes throughout the program or website,
// declare it using a var statement.
// Otherwise, if its value does not change, declare it using
// a const statement.
const myConst='A const does not change.';
var myVar='A var does change.';
var myVar=2;
Thank you!
7
4.14
(7 Votes)
0
3.38
8
const b = 1; // this variable unique and can't change it.
Thank you!
8
3.38
(8 Votes)
0
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