Using the getGeoLocation() I am able to get the coordinates and have them saved on the data collection to tie it in with a users profile. I am currently working on a code to calculate the distance between the logged din user and the profile they are viewing. I am able to display their coordinates and I am having trouble with displaying the distance. I am using the following code right now but it give me an “NaN” value (Not a Number); can someone help me out to understand what I am missing. Thank you. I am thinking that maybe the Input element does not display Numbers since it displays Strings, but how would I got about converting the results of the distance function calculation to a string?

function distance ( lat1 ,
lat2 , lon1 , lon2 )
{
// degrees to radians.
lon1 = lon1 * Math . PI / 180 ;
lon2 = lon2 * Math . PI / 180 ;
lat1 = lat1 * Math . PI / 180 ;
lat2 = lat2 * Math . PI / 180 ;

// Haversine formula
let dlon = lon2 - lon1 ;
let dlat = lat2 - lat1 ;
let a = Math . pow ( Math . sin ( dlat / 2 ), 2 )
+ Math . cos ( lat1 ) * Math . cos ( lat2 )
* Math . pow ( Math . sin ( dlon / 2 ), 2 );
let c = 2 * Math . asin ( Math . sqrt ( a ));
// Radius of earth in miles
let r = 3956 ;
// calculate the result
**return** ( c * r );
}

Hello Yisrael,
Thank you for your response. I tried converting them to Numbers, and I still get the NaN. I played around with also converting the numbers to a String and it didn’t help. Could the Problem actually be in the function distance itself?
just so you can see what I tried; and still not working. Thanks for your patience and your help.

$w . onReady (() => { let lat1 = Number ( $w ( “#userLat” )) let lat2 = Number ( $w ( “#profileLat” )) let lon1 = Number ( $w ( “#userLong” )) let lon2 = Number ( $w ( “#profilelong” ))
$w ( “#distanceMiles” ). value = distance ( lat1 , lon1 , lat2 , lon2 ).toString()
});

don’t do it when the $w is ready, but when the values are filled out.
(I don’t know your use case. Maybe on dataset.onReady, maybe onInput).

And if it’s not an input element but a text element, do:
$w.onReady(() => {
$w(‘#dataset1’).onReady(() => {
const lat1 = Number($w(“#userLat”). text )
})
})

Here is the Finished code that worked, thanks to the help from @J. D. and @yisrael-wix

function distance ( lat1 , lat2 , lon1 , lon2 )
{
lon1 = lon1 * Math . PI / 180 ;
lon2 = lon2 * Math . PI / 180 ;
lat1 = lat1 * Math . PI / 180 ;
lat2 = lat2 * Math . PI / 180 ;

**let** dlon = lon2 - lon1 ;
**let** dlat = lat2 - lat1 ;
**let** a = Math . pow ( Math . sin ( dlat / 2 ), 2 )
+ Math . cos ( lat1 ) * Math . cos ( lat2 )
* Math . pow ( Math . sin ( dlon / 2 ), 2 );
**let** c = 2 * Math . asin ( Math . sqrt ( a ));
**let** r = 3956 ;
**return** ( c * r );
}

$w ( ‘#userDataset’ ). onReady (() => { const lat1 = Number ( $w ( “#userLat” ). text ) const lat2 = Number ( $w ( “#profileLat” ). text ) const lon1 = Number ( $w ( “#userLong” ). text ) const lon2 = Number ( $w ( “#profilelong” ). text )
$w ( “#distanceMiles” ). text = Math.round ( distance ( lat1 , lat2 , lon1 , lon2 )) + " Miles"
})