Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Simply, whats the fundamental difference between $param and ${param} ?

share|improve this question

1 Answer 1

up vote 3 down vote accepted

There is none. It's for echoing a variable immediately followed by a string.

For example, if you have $param, but you want to have right after it, "lbs"

echo "${param}lbs"

Where as

echo "$paramlbs"

Would look for an incorrect variable name

share|improve this answer
2  
Correct, but not just for echo, but any time you do that kind of concatenation. –  Dennis Williamson Dec 8 '09 at 6:36

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.