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if loop problem in bourne shell

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# 1  
Old 09-18-2008
if loop problem in bourne shell
how to use if-loop in bourne shell with multiple conditions like follows

if [ a > b && c > d ]
then
commands
fi

it gives me an error

test: ] missing

then i put
if [[ a > b && c > d ]]
it gives me an error
[[ not found

kindly i need the syntex for the bourne shell
# 2  
Old 09-18-2008
Have you tried
Code:
if [ a > b ] && [ c > d ]

# 3  
Old 09-18-2008
You must have an ancient version -
Code:
if [ $a -gt $b ] ; then
   if [ $c -gt $d ] ; then
   fi
fi

is what you will have to use.
# 4  
Old 09-18-2008
Tools Does the following example help you?
The first example executes to TRUE, and prints "greater". The second example is FALSE, and nothing prints

Code:
> if [ 14 -gt 13  -a  15 -gt 12 ] ; then echo "greater"; fi
greater

> if [ 4 -gt 13  -a  5 -gt 12 ] ; then echo "greater"; fi

# 5  
Old 09-18-2008
Quote:
You must have an ancient version -
Seems I wasn't paying attention to the argument - just the format! Thanks Jim Smilie

This is what it could look like:
Code:
if [ $a -gt $b ] && [ $c -gt $d ]

# 6  
Old 09-20-2008
if loop problem in bourne shell
Thanks a lot guys , all the syntax worked fine except this one

if [ a > b ] && [ c > d ]

...thanks again Smilie
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