CODEWITHSUNDEEP
javascript
GeekByDesign
GeekByDesign

Reputation: 436

How to use a return value in another function in Javascript?

I'm self-teaching myself JavaScript and out of curiosity I'm wondering what is the proper way of returning a value from one function to be used in another function. For example:

function firstFunction() {
  // do something;
  return somevalue 
}

So how do I set up the second function to use somevalue? Thanks.

Upvotes: 19

Views: 149572

Answers (7)

Akash Shinde
Akash Shinde

Reputation: 1

function reSult(num1,num2){
    
    if(num1<=num2){
        
        return num1 + num2
    }
    else
    {
        
        return num1 -num2
    }
}



let pass= reSult(40,5);



function outPut(pass,num3){
    if(pass<=40){
        return pass * num3 
    }
    else{
        return pass / num3
    }

}
console.log(outPut(pass,20))

Upvotes: 0

Anand Raja
Anand Raja

Reputation: 3108

To copy the return value of any javascript(in chrome console), we can use inbuilt copy() method.

you can use any expression, function, etc find some examples below

  1. using expresseion

a = 245; copy(a);

  1. using function
a = function() {
  return "Hello world!"
}
copy(a());

Official Doc for reference

Upvotes: -1

Nazmul Haque
Nazmul Haque

Reputation: 868

var captcha = '';
//function name one
function one(captcha){
var captcha = captcha;
//call another function and pass variable data
var captcha = firstFunction(captcha); 
};
// second function name
function firstFunction(captcha){
alert(captcha);
}

Upvotes: 0

Hanky Panky
Hanky Panky

Reputation: 46900

Call the function and save the return value of that very call.

function firstFunction() {
  // do something
  return "testing 123";
}

var test = firstFunction();  // this will grab you the return value from firstFunction();
alert(test);

You can make this call from another function too, as long as both functions have same scope.

For example:

function testCase() {
  var test = firstFunction(); 
  alert(test);
}

Demo

Upvotes: 39

user1636522
user1636522

Reputation:

You could call firstFunction from secondFunction :

function secondFunction() {
    alert(firstFunction());
}

Or use a global variable to host the result of firstFunction :

var v = firstFunction();
function secondFunction() { alert(v); }

Or pass the result of firstFunction as a parameter to secondFunction :

function secondFunction(v) { alert(v); }
secondFunction(firstFunction());

Or pass firstFunction as a parameter to secondFunction :

function secondFunction(fn) { alert(fn()); }
secondFunction(firstFunction);

Here is a demo : http://jsfiddle.net/wared/RK6X7/.

Upvotes: 3

nrsharma
nrsharma

Reputation: 2562

You can do this for sure. Have a look below

function fnOne(){
  // do something
  return value;
}


function fnTwo(){
 var strVal= fnOne();
//use strValhere   
 alert(strVal);
}

Upvotes: 0

Ankit Tyagi
Ankit Tyagi

Reputation: 2375

Call function within other function :

function abc(){    
    var a = firstFunction();    
}

function firstFunction() {
    Do something;
    return somevalue 
}

Upvotes: 0

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