How do you write a full program to find factors of given number in UNIX shell programming?

Answer 1

echo "Enter a number: "

read num

i=2

res=1

if [ $num -ge 2 ]

then

while [ $i -le $num ]

do

res=`expr $res \* $i`

i=`expr $i + 1`

done

fi

echo "Factorial of $num = $res" v

Answer 2

Bash script to find factorial of a number

$ cat fact.sh

#!/bin/bash

if [ $# -ne 1 ]

then

echo "Usage: "

echo " $0 "

exit 1

fi

no=$1

fact=1

if [ $no -le 0 ]

then

echo "Please pass positive value."

exit 1

fi

while [ $no -ge 1 ]

do

let fact=fact*no

let no=no-1

done

echo "$1! = $fact"

Answer 3

clear

echo "Enter n"

read n

f=1

while [ $n -gt 0 ]

do

f=`expr $f \* $n`

n=`expr $n - 1`

done

echo "Factorial is " $f

Output :Enter n

5

Factorial is 120

Answer 4

#!/bin/sh

echo "Enter the number"

read num

factorial=1

for i in `seq 1 $num`

do

factorial=`expr $i \* $factorial`

done

echo $factorial

Answer 5

function fac() { [[ $1 < 2 ]] && echo $1 echo $(($1 * $(fac $(($1 - 1))))); }

Answer 6

#!/bin/bash
f=1
echo "The factorial is:"
for (( n=5;n>=1;n=n-1 ))
do
echo $f
(( f=f*n ))
done