[Techtalk] Bash functions with user-defined parameters

[Berenice]

I've been messing around with bash and want to create a function that
takes two different integers and increments the first integer by 1,
until the first integer is the same as the second integer.  Eg: if
there are 2 numbers, 1 and 4, add 1 to the first number until it
becomes 4.  

Now I can do this interactively like this:

#!/bin/bash
echo "Enter 2 numbers:"
read num1 num2
while [ $num1 -le  $num2 ]
do
  echo $num1
  num1=$(( $num 1 + 1 ))
done
  
But I'm having trouble making it into a function that executes by
typing the function name with parameters, eg: myfunction 1 4. Here's
what I've done so far:


#!/bin/bash
myfunction()
{
while [ $1 -le $2 ]
do
 echo $1
 #problem here...$(( $1 + 1 ))
done
}


The problem is with the $(( $1 + 1 )) because you can't do $1=$(( $1
+ 1 )).  Is there a way to fix this, or should I forget about using
$1 and $2?

Thanks
Berenice




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