#!/bin/bash# multiplication.shmultiply ()                     # Multiplies params passed.{                               # Will accept a variable number of args.  local product=1  until [ -z "$1" ]             # Until uses up arguments passed...  do    let "product *= $1"    shift  done  echo $product                 #  Will not echo to stdout,}                               #+ since this will be assigned to a variable.mult1=15383; mult2=25211val1=`multiply $mult1 $mult2`echo "$mult1 X $mult2 = $val1"                                # 387820813mult1=25; mult2=5; mult3=20val2=`multiply $mult1 $mult2 $mult3`echo "$mult1 X $mult2 X $mult3 = $val2"                                # 2500mult1=188; mult2=37; mult3=25; mult4=47val3=`multiply $mult1 $mult2 $mult3 $mult4`echo "$mult1 X $mult2 X $mult3 X $mult4 = $val3"                                # 8173300exit 0