if statement in a while loop

bobo · #1 (**permalink**) 11-07-2006

#!/usr/bin/ksh
echo Please enter
while read n
do
echo $n >> datafile
done

question:

How can I enject an if statement that if the users enter 0 (zero) the program will exit?

this is what I have but not working

#!/usr/bin/ksh
echo Please enter number
while read n
do
if $n=0
then
exit
else
echo $n >> datafile
fi
done

Thanks!

tmarikle · #2 (**permalink**) 11-07-2006

Read up on the test command (man test)

Code:

if [[ $n -eq 0 ]]
then
    exit
fi

BOFH · #3 (**permalink**) 11-07-2006

You have to use the test construct in the if statement:

Code:

#!/usr/bin/ksh

echo Please enter number

while read n
do
  if [ $n=0 ]
  then
    exit
  else
    echo $n >> datafile
  fi
done

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