Hello all!

I want to verify if the first 2 characters of a string are "+-".
Can you please help me with that? How can I compare if the varaible (let's say P1 begins with "+-" )


Thanks in advance,
Chris

Try this:

Code:

[[ `echo $P1|cut -c1-2` == '+-' ]] && echo 'Yes.'

Thanks a lot for your help!

Chris

Hi!

In fact pdreyer's solution is the one I have chosen already!

Thank you all!

Oh, I'm having a similar problem, I need to compare 2 or more characters (letters) to find out which is the largest or lowest one.

For example, I enter each letters one by one, like a, b, c, d, e, so the largest one is e and the lowest one is a.

How can I do that?

Hi!

I think you should parse the letters array and store the lowest.
For example

min="ZZZ" //or the first object of the array

for i in letters_array
do
if [[ $i < $min ]]
then
min=$i
fi
done


Hope that helps!
Chris