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#1
March 2nd, 2005, 08:40 AM
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multiple ands
Hi
I'm trying to write a script with if (varable1 = x and variable2 = y and variable3 = z) then ..... I've tried using -a and it doesn't seem happy with this. Any help would be appreciated.
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#2
March 2nd, 2005, 12:06 PM
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Code:
#!/bin/ksh
a=1
b=2
c=3
if [ $a -eq 1 ] && [ $b -eq 2 ] && [ $c -eq 3 ]; then
echo "yes"
fi
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#3
March 2nd, 2005, 02:20 PM
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the if statement is not easy, exactly in your situation (AND you have no OR statements).
in shells the -eq¦-lt¦le.... are NUMERICAL comparison operators in perl they are ALPHABETICAL in shell = is ALPHANUMERICAL in perl == is NUMERICAL as long you dont need ARITHMETICS, i mean if(2 >3) ... [ c notation] get rid of this using a faster tool: Code:
case $aa$bb$cc in 123) ;; *) exit ;; esac next code..... there is a paper in web, i dont remember, something like 'improve shells performance' , google for and read it. anyway this must work (on every shell, but csh) Code:
if [ $a -eq 1 -a $b -eq 2 -a $c -eq 3 ]; then if [ x$a = xAA -a x$b = xBB -a x$c = xCC ]; then
__________________
working on Solaris[5-9], preferred languages french and C.
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