toLowerCase not working replacement function

Question

The  toLowerCase method is giving me an error when I try to use it on numbers  This is what I have   var ans   334  var temp   ans toLowerCase    alert temp     And then it gives me this error    undefined  is not a function  evaluating  ans toLowerCase       I don t know where I got this wrong  I always thought that numbers can also be parsed  with no change in result  maybe that s where I stuffed up    But if that s not the error  can someone write a custom makeLowerCase function  to make the string lower case  perhaps using regex or something

User · Answer

Numbers inherit from the Number constructor which doesn t have the  toLowerCase method  You can look it up as a matter of fact    toLowerCase  in Number prototype     false

User · Answer

var ans   334       var temp   ans toLowerCase    alert temp

User · Answer

It s not an error  Javascript will gladly convert a number to a string when a string is expected  for example parseInt 42    but in this case there is nothing that expect the number to be a string   Here s a makeLowerCase function      function makeLowerCase value      return value toString   toLowerCase

User · Answer

toLowerCase function only exists on strings  You can call toString   on anything in javascript to get a string representation  Putting this all together   var ans   334  var temp   ans toString   toLowerCase    alert temp

User · Answer

It is a number  not a string  Numbers don t have a toLowerCase   function because numbers do not have case in the first place   To make the function run without error  run it on a string   var ans    334     Of course  the output will be the same as the input since  as mentioned  numbers don t have case in the first place

[javascript] .toLowerCase not working, replacement function?

Examples related to javascript

Examples related to string

Examples related to lowercase