LinuxQuestions.org - Bash script gives weird output

Quote:

Originally Posted by jonaskellens (Post 4605782)

Number=${Number/ /} removes white spaces

It removes spaces. Your previous version, ${Number//[[:space:]]}, removes whitespace. Whitespace is any of the characters space, tab and newline.

EDIT: actually ${Number/ /} removes only the first space. ${Number// /} removes all spaces and can be more simply given as ${Number// }. Here's a command prompt illustration:

Code:

c@CW8:~$ x=' a b c '

c@CW8:~$ echo "'${x/ /}'"

'a b c '

c@CW8:~$ echo "'${x// /}'"

'abc'

c@CW8:~$ echo "'${x// }'"

'abc'