shell script in android gives [: not found

Question

I have this script which works on my linux machine

#!/bin/sh
c=1
if [ $c == 1 ]
then
  echo c is 1
else
  echo c is 0
fi

But when I use this in

Answer 1

use /system/bin/cmp for equality test. if you need numerically test, substitute $(($c == 1)) with $c

#!/system/bin/sh
echo $c >/tmp/a
echo 1 >/tmp/b
if cmp /tmp/a /tmp/b
    echo c is 1
else
    echo c is 0
fi