Pass a variable from one function to another

Question

I'm trying to pass a variable from one function to another. I thought this would work but I get undefined.

function launch(){
    amount();
    finalize(theAmount);
}

function amount(){
    var theAmount = prompt('How much?');
    return theAmount;
}

function finalize(theAmount){
     alert(theAmount);   
}

launch();

"theAmount" is lost on the stack bro. You could just declare it outside the functions (not best practice but works though). — Emmanuel John
– Emmanuel John, Commented Dec 21, 2013 at 5:54

thefourtheye · Accepted Answer · 2013-12-21 05:58:03Z

4

You are trying to access the variable which is defined in some other function. Thats NOT possible because of Javascript's scope restrictions. You have to pass the return value as it is or you have to assign it to a variable and then pass it to the function.

Either this

function launch(){
    finalize(amount());
}

Or

function launch(){
    var theAmount = amount();
    finalize(theAmount);
}

edited Dec 21, 2013 at 5:58

answered Dec 21, 2013 at 5:51

thefourtheye

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Comments

Satish Sharma · Accepted Answer · 2013-12-21 06:52:36Z

0

you are calling amount function in lunch function which is returns a value but you haven't receive it.

try this to modify lunch function as

function launch(){
    var theAmount = amount();
    finalize(theAmount);
}

function amount(){
    var theAmount = prompt('How much?');
    return theAmount;
}

function finalize(theAmount){
     alert(theAmount);   
}

launch();

answered Dec 21, 2013 at 6:52

Satish Sharma

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