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Why "@z=$x+$y" doesn't work?

 
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# 1  
Old 01-18-2005
Why "@z=$x+$y" doesn't work?
253 lab2-36:~/try_direct/another> set x=1;set y=2;@z=$x+$y
@z=1+2: Command not found.
254 lab2-36:~/try_direct/another>
# 2  
Old 01-18-2005
What shell?

In ksh or bash (probably bourne), this will work:
Code:
X=1 ; Y=2 ; Z=`expr $X + $Y`

or in bash:
Code:
X=1 ; Y=2 ; let Z=$X+$Y

# 3  
Old 01-18-2005
TC shell , actually
# 4  
Old 01-18-2005
I have never used TC, but you might try the first example.

Read the man page on the shell. It should detail the use of shell built in's (mathematic functions are in most "modern" shells.)
# 5  
Old 01-18-2005
You've never used TC? Which shell is better, so far as you are concerned?
# 6  
Old 01-18-2005
The first one does not work:
254 lab2-36:~/try_direct/another> x=1;y=2;z='expr $x + $y'
x=1: Command not found.
y=2: Command not found.
z=expr $x + $y: Command not found.
255 lab2-36:~/try_direct/another>
# 7  
Old 01-18-2005
I changed a little bit about the first one, without any effect
255 lab2-36:~/try_direct/another> set x=1; set y=2; set z='expr $x+$y'
256 lab2-36:~/try_direct/another> echo $z
expr $x+$y
 
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