Question

I have a json file which I am accessing through JS

latitude =data8.weblandmarks8[j].latitude + latitude;

should add all the latitudes so that I could average them later
instead it just concatenates them
How should i achieve what I want to

Json entry

"latitude": "28.14331",

Answer 1

Aside from using parseFloat you could convert to Number, it’s slightly faster and usable for both integers and floats¹:

latitude = Number(data8.weblandmarks8[j].latitude) + latitude;

¹ another advantage for integers is that you don’t need to supply a radix. Number('09') returns 9, whereas parseInt('09') (i.e. parseInt without a radix) returns 0 (that’s because parseInt defaults to an octal – radix 8).