Is it Possible to pass a variable inside a function as parameter in javascript?

Question

Just Curious to know whether there is any hack for it!

Example:

var a, b, c, d, e, f, g; //global Variables 

function add(para){
    para = 10+10;
};

add(a);

console.log(a); //Prints Undefined

I want to assign 10+10 to the global variable by passing the variable as parameter.

No, reassigning a parameter by itself will never have any effect on the outer variable the function was called with. — CertainPerformance, May 10 '18 at 06:58
https://stackoverflow.com/questions/7744611/pass-variables-by-reference-in-javascript is probably what you are asking about — Suraj Rao, May 10 '18 at 07:00

score 2 · Accepted Answer · answered May 10 '18 at 07:00

2

You need to set the value of global variable a inside the function add(para) to get it's value outside the function in your console.log()

var a, b, c, d, e, f, g; //global Variables 

function add(para){
    para = 10+10;
    //set the value of a
    a = para;
};

add(a);

console.log(a);

answered May 10 '18 at 07:00

Ankit Agarwal

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So if I want to pass other variables then, `var a, b, c, d, e, f, g; //global Variables function add(para){ para = 10+10; //set the value of a a = para; b = para; c = para; d = para; e = para; f = para; }; add(a); console.log(a);` I need to do it this way – Banu Prashanth May 10 '18 at 07:12
@BanuPrashanth in that case you need to use a object. – Ankit Agarwal May 10 '18 at 07:13
`var obj = {a: "", b: ""}; function add(par){ par.a = 10+10; }` Yup! Thanks :) – Banu Prashanth May 10 '18 at 07:16
@BanuPrashanth glad to help – Ankit Agarwal May 10 '18 at 07:23

Is it Possible to pass a variable inside a function as parameter in javascript?

1 Answers1