Casting an string to float javascript

Question

I have an string defining the lattitude of an event with this format "p002.155" and "n003.196" being "p" and "n" the form the system define if the number is positive or negative.

I need to parse the string to float, tried with parseFloat but keeps getting NaN value because of the char inside the string

how can I do it?? Thanks.

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– mplungjan, Commented Jul 26, 2018 at 12:01

mplungjan · Accepted Answer · 2018-07-26 12:11:40Z

4

You can replace the char and then convert to float:

var str = "n002.155";
str = +str.replace("p","").replace("n","-"); //here the leading `+` is casting to number
console.log(str);

edited Jul 26, 2018 at 12:11

mplungjan

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answered Jul 26, 2018 at 12:04

Pierre Capo

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1 Comment

Pierre Capo Over a year ago

@ALEXANDERRAMIREZ if you don't mind, if it's working for you, check this answer as accepted please

mplungjan · Accepted Answer · 2018-07-26 12:05:57Z

1

You can use substring and look at the first char

function getFloat(str) {
  var sign = str.charAt(0)=="n"?-1:1;
  return parseFloat(str.substring(1))*sign;
}

var latPStr = "p002.155", latNStr = "n003.196";
console.log(getFloat(latPStr),getFloat(latNStr));

answered Jul 26, 2018 at 12:05

mplungjan

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1 Comment

Pete Over a year ago

I often get downvotes when I post working solutions in js - not sure why but js users really don't like working answers, unless it was the first to be upvoted

Zeeshan Tariq · Accepted Answer · 2018-07-26 12:05:03Z

0

You can convert a string to float like this:

var str = '3.8';
var fl= +(str);  //fl is a variable converted to float
console.log( +(str) );
console.log("TYPE OF FL IS THIS "+typeof fl);

+(string) will cast string into float.

answered Jul 26, 2018 at 12:05

Zeeshan Tariq

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2 Comments

Teemu Over a year ago

Reading the question is always useful. How does this convert a string like "n003.196" to a float?

mplungjan Over a year ago

Why is this voted up at all? there is no handling of n/p

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