check data type in js
typeof("string"); //string
typeof(123); //numbercheck data type in js
typeof("string"); //string
typeof(123); //numberjavascript check type of variable var
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"javascript all type of data
let a = ["A", 1, true, [], [2, 'x'],{},{a:'B'}, NaN, undefined, null];
let s = a.toString();
console.log(s);//"A,1,true,,2,x,[object Object],[object Object],NaN,, "Copyright © 2021 Codeinu
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