simple-interest.sh

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       #!/bin/bash
       # This script calculates simple interest given principal,
       # annual rate of interest and time period in years.
       # Do not use this in production. Sample purpose only.
       # Author: Upkar Lidder (IBM)
       # Additional Authors:
       # adebiyi422
       # Input:
       # p, principal amount
       # t, time period in years
       # r, annual rate of interest
       # Output:
       # simple interest = p*t*r
       echo "Enter the principal:"
       read p
       echo "Enter rate of interest per year:"
       read r
       echo "Enter time period in years:"
       read t
       s=`expr $p \* $t \* $r / 100`
       echo "The simple interest is: "
       echo $s