Translate

Archives

Image of Advanced Programming in the UNIX Environment, Second Edition (Addison-Wesley Professional Computing Series)
Image of RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302) (Certification Press)
Image of Linux Kernel Development (3rd Edition)
Image of Operating System Concepts

Shell String Concatenation

Many people are unaware that string concatenation using the += syntax is fully supported in modern versions of both the Bash and Korn shells Here is a simple example which demonstrates the syntax: str=”Hello” $ str+=” ” $ str+=”World” $ echo $str Hello World $ If you use this syntax with “numbers”, you end up with a string that looks like a number but is not a number. $ a=2 $ a+=4 $ echo $a $ 24