#Javascript convert string to number how to#
#Javascript convert string to number code#

#Javascript convert string to number code#

Code quality and lint tools may also raise a warning. As a result, older outdated browsers may cause you conversion problems. Before 2016, they both required a second mandatory parameter called the radix. There is one caveat with the parseInt and parseFloat functions. If you run the code above and look at your browser console, you will see вЂњNaNвЂќ being printed out. This will occur if you do something silly like this: //This code will result in a NaN value In case you didnвЂ™t already know, NaN is an acronym for вЂњNot a NumberвЂќ. Note that if the parseFloat function fails to parse the string into a float, it will return a NaN value. As a result, we kept our two decimal places. Here, we were able to convert our string into a float value by using the native parseFloat function. If you have decimal places that you would like to keep, then you will need to convert the string into a float value: //A JS string with decimal places. This is because round is a static method.Д¬onverting a JavaScript string in a float value with decimals. Note that you do not need to create a Math object in order to call the round method. The code above results in the integer 13 being returned.

The result is 13, as 12.583 is closer to 13 than 12. Round the number inside our string using Math.round If you would prefer to the round the number to the closest integer, then you can use the Math.round method like so: //String value with decimal places. If you run the code above, you will see that JavaScript has removed our decimal places and rounded the number down. The result is 12, as JavaScript will round However, what if our string contains a number that has decimal places? //A number with decimal places. In the snippet above, we used the native parseInt function to parse our string and return the integer value. If your number does not contain decimal places, then you can simply convert the string into an integer value: //Example JavaScript string that contains a number LetвЂ™s jump right in and take a look at a few examples!Д¬onverting a JavaScript string into an int.

#Javascript convert string to number how to#

In this guide, I will show you how to parse a string into an int or a float value. This is a short tutorial on how to convert a string into a number using JavaScript.