Question

Please write a bash script for the following two questions, thank you.   

1. Write a shell script “6-1.sh” to calculate the exponentiation using while loop. This script needs to take two inputs like “6-1.sh a b”, and outputs the result of “a^b”. Note: You need to implement it, DO NOT use the exponentiation operation provided by the Linux.
2.    Write a shell script “6-2.sh” to calculate the factorial of a number using while loop. This script needs to take one input like “6-2.sh a”, and outputs the result of “a!”.

Answer 1

Code screenshot of 6-1.sh

Here $1 and $2 are used for input arguments (first and second)

Code output :-

Code in text format:-

#!/bin/bash
a=$1
b=$2
result=1
while [ $b -ge 1 ]
do
result=$(( result*a))
b=$(( b-1 ))
done
echo $result

Code screenshot of 6-2.sh

Code Output;-

Code in text format;-

#!/bin/bash
a=$1
result=1
while [ $a -ge 1 ]
do
result=$(( result*a))
a=$(( a-1 ))
done
echo $result