Is there a native function to get the prefix numbers in javascript?

Question

'123xswer'

How to retrieve 123 from the string above without using regular expression?

Answer 1

Use split function .

var str='123xwer' ;
arr = str.split('x') ;
alert ( arr[0] ) ;

Answer 2

> parseInt('123xswer', 10)
  123

(Leading zeros won't be kept.)

(The "10" is to specify we want decimal numbers, so that 099abcd can return the expected integer.)