Hello guys!

Can say me anybody about operatios with unix, I don't to make operations, only inside in a variable, like this

#y=4
#x=2
#let z=$y-$x
#echo $z
# 2

but I can't to make mathematical operations with decimal like this

#y=3.2
#x=1.5
#let z=$y-$x
#echo $z
# 3

this operations, I get result integers.

That's right. The shell's built-in arithmetic is integer only. Try using bc instead...

y=3.2
x=1.5
z=`echo $y - $x | bc`
echo $z

I apreciate the help you gave me about my mathematic problem, it help me a lot.

Thanks Perderabo