Myujth

I have a function with an if-statement that in turn should call an outside function whether or not something is true. The result I get is 'undefined'. Could you please point me in the right direction?

Function 1:

function printRange(rangeStart, rangeStop) 
 let summa = ;

 for (i = rangeStart; i <= rangeStop; i++) 
 summa.push(i);
 
 let result2 = summa.join();
 return result2;

Function 2:

function printRangeReversed(rangeStart, rangeStop) 
 let summa = ;

 for (i = rangeStart; i >= rangeStop; i--) 
 summa.push(i);
 
 let result3 = summa.join();
 return result3;

Function 3:

function printAnyRange(rangeStart, rangeStop) 

 if (rangeStart < rangeStop) 
 printRange(rangeStart, rangeStop);
 else 
 printRangeReversed(rangeStart, rangeStop);
 
 return;

Calling the function: printAnyRange(21, 45);

As I said it all looks logical to me but I guess it isn't since I get the 'undefined'.

Expected result should be: "21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45"

Regards.

You're not returning anything. Capture the result of the functions and return that variable.

function printRange(rangeStart, rangeStop) 
 let summa = ;

 for (i = rangeStart; i <= rangeStop; i++) 
 summa.push(i);
 
 let result2 = summa.join();
 return result2;


function printRangeReversed(rangeStart, rangeStop) 
 let summa = ;

 for (i = rangeStart; i >= rangeStop; i--) 
 summa.push(i);
 
 let result3 = summa.join();
 return result3;


function printAnyRange(rangeStart, rangeStop) 
 let result = null;

 if (rangeStart < rangeStop) result = printRange(rangeStart, rangeStop);
 else result = printRangeReversed(rangeStart, rangeStop);
 
 return result;


console.log(printAnyRange(1,5));
console.log(printAnyRange(5,1));

The value that is getting returned from function 1 and function 2 is not being using or stored by function 3. Try following code:

function printAnyRange(rangeStart, rangeStop) 

 if (rangeStart < rangeStop) 
 return printRange(rangeStart, rangeStop);
 else 
 return printRangeReversed(rangeStart, rangeStop);
 

console.log(printAnyRange(10, 15));

this should fix the issue.

You need to do something with the returned values, like log them:

function printAnyRange(rangeStart, rangeStop) 

 if (rangeStart < rangeStop) 
 console.log(printRange(rangeStart, rangeStop));
 else 
 console.log(printRangeReversed(rangeStart, rangeStop));
 
 return;

Or return them from the main function:

function printAnyRange(rangeStart, rangeStop) 

 if (rangeStart < rangeStop) 
 result = printRange(rangeStart, rangeStop);
 else 
 result = printRangeReversed(rangeStart, rangeStop);
 
 return result;