Shell Programming and Scripting

while [[ $a -lt 1.5 || $b -gt 0.7 ]]
do
(operation that will reassign $a and $b)
if [[ $a -gt 1.5 && $b -lt 0.7 ]]
then
break
fi
done

line 66: [[: 2.4: syntax error: invalid arithmetic operator (error token is ".4")
 line 66: [[: 0.701: syntax error: invalid arithmetic operator (error token is ".701")

echo $SHELL

/sw64/bin/zsh

$ cat x
#!/bin/zsh

typeset -F a=1.4
typeset -F b=1.7

printf "START - a: %0.2f, b: %0.2f\n\n" $a $b

while (( $a < 1.5 || $b > 0.7 )); do
  (( a=$a + .1 ))
  (( b=$b - .1 ))
  printf "a: %0.2f, b: %0.2f\n" $a $b
  if (( $a > 1.5 && $b < 0.7 )); then
    break
  fi
done

exit 0
$ ./x
START - a: 1.40, b: 1.70

a: 1.50, b: 1.60
a: 1.60, b: 1.50
a: 1.70, b: 1.40
a: 1.80, b: 1.30
a: 1.90, b: 1.20
a: 2.00, b: 1.10
a: 2.10, b: 1.00
a: 2.20, b: 0.90
a: 2.30, b: 0.80
a: 2.40, b: 0.70
$