extra credit for math 42 @sjsu

math42.bat

@ECHO OFF

echo This script is only accurate up to 45.
echo Anything larger will be an overflow.

:vars
set /p stop="Enter end number: "
set num1=0
set num2=0
set c=0

echo  0:  0 
set /a "c+=1"

if %stop% LSS 0 (
  echo Bad ARG
  pause
  exit
)

:loop
  set /a "stop=%stop%-1"
  if %num1% EQU 0 (
    set /a "num2+=1"

  )
  set /a out="%num1% + %num2%"
  set num1=%num2%
  set num2=%out%
  if %c% LSS 10 (
    echo  %c%:  %out%
  )
  if %c% GEQ 10 (
    echo  %c%: %out%
  )
  set /a "c=%c%+1"
if %stop% GEQ 0 (
  goto loop
)
echo end
pause
exit

math42.sh

#!/bin/bash
# A simple script that calculates the nth number
# Usage: math.sh $n
# where $n is the number you want to stop at
num1=0
num2=0
c=0
echo " 0:  0 "
let c+=1
until [ $[ $c + 1 ] -gt $1 ]; do
  let c+=1
  if [ $num1 -eq 0 ]; then
    let num2+=1
  fi
  out=$[ $num1 + num2 ]
  num1=$num2
  num2=$out
  if [ $c -lt 10 ]; then
    echo " $c:  $out "
  else
    echo " $c: $out "
  fi

done