write a shell script to find the largest number from 3 given
numbers.
Answers were Sorted based on User's Feedback
Answer / vipul dalwala
if [ $# -ne 3 ]
then
echo "$0: number1 number2 number3 are not given" >&2
exit 1
fi
if [ $1 -eq $2 ] && [ $1 -eq $3 ]
then
echo "All the three numbers are equal"
elif [ $1 -eq $2 ] && [ $1 -gt $3 ]
then
echo "$1 and $2 numbers are equal and are largest
numbers among $1 $2 and $3"
elif [ $1 -eq $3 ] && [ $1 -gt $2 ]
then
echo "$1 and $3 numbers are equal and are largest
numbers among $1 $2 and $3"
elif [ $2 -eq $3 ] && [ $2 -gt $1 ]
then
echo "$2 and $3 numbers are equal and are largest
numbers among $1 $2 and $3"
elif [ $1 -eq $2 ] && [ $1 -lt $3 ]
then
echo "$3 is largest number among $1 $2 and $3"
elif [ $1 -eq $3 ] && [ $1 -lt $2 ]
then
echo "$2 is largest number among $1 $2 and $3"
elif [ $2 -eq $3 ] && [ $2 -lt $1 ]
then
echo "$1 is largest number among $1 $2 and $3"
elif [ $1 -gt $2 ] && [ $1 -gt $3 ]
then
echo "$1 is largest number among $1 $2 and $3"
elif [ $2 -gt $1 ] && [ $2 -gt $3 ]
then
echo "$2 is largest number among $1 $2 and $3"
elif [ $3 -gt $1 ] && [ $3 -gt $2 ]
then
echo "$3 is largest number among $1 $2 and $3"
else
echo "I can not figure out which number is
largest"
fi
Is This Answer Correct ? | 22 Yes | 19 No |
Answer / a
mr imran/vipul
when i run this script it always say number not given
what is the reason and how would this ask for the those 3 numbers to be sorted ??
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / aseem
Hi Imran,
Could you please run your script with below parameter
4 45 1. It will give the output as "1 is the largest number"
reason is you have used only sort command not sort -nr so it will not sort in reverse order, so in your case head -1 will rather than tail -1.
Hi A,
Regarding your answer you have to run by below way.
say you are keeping your script in file test.sh
then
sh test.sh 43 1 34
Actually it takes the positional parameter so after script whatever input you provide it takes as parameter.
Feel free to send me email aseem02@gmail.com if you have any doubt regarding shell scripting, will glad to help you guys.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / aseem
Hi
"In continuation to above answer.
If you want to write a script in more generic way.
if [ $# -eq 0 ]
then
echo "$0: numbers are not given" >&2
exit 1
fi
LARGEST=$(echo $* | xargs -n1 | sort -nr | tail -1)
echo "$LARGEST is largest number""
The above script is good but there is a small msitake. As
numeric sort is used in reverse order so the biggest number
will come first, so we should use head -1 rather than tail -
1
Is This Answer Correct ? | 9 Yes | 8 No |
Answer / md. imran
if [ $# -eq 0 ]
then
echo "$: numbers are not given" >&2
exit 1
fi
LARGEST=$(echo $* |xargs -n1 |sort |head -1)
echo $LARGEST is largest number"
or if you want to take input from a file so type following
cat <filename>|xargs -n1|sort|head -1
Note : In first scipt mistake was in tail -1
right answer is head -1 which i have mentioned there.
thanks
Is This Answer Correct ? | 5 Yes | 5 No |
Answer / vipul dalwala
In continuation to above answer.
If you want to write a script in more generic way.
if [ $# -eq 0 ]
then
echo "$0: numbers are not given" >&2
exit 1
fi
LARGEST=$(echo $* | xargs -n1 | sort -nr | tail -1)
echo "$LARGEST is largest number"
Is This Answer Correct ? | 13 Yes | 15 No |
What is the use of a shebang line?
How to create environment variables?What are the conditions for creating variables?
What does path stand for?
How to customise the existing shell?
Is powershell a language?
What is the fastest scripting language?
Write down the syntax for all the loops in shell scripting.
HOW TO CREATE 10 USERS IN UNIX(HP-UX) USING SHELL SHELL SCRIPT?
Tell something about the super block in shell scripting?
How will I insert a line "abcdef" at every 100th line of a file?
Devise a script that takes file name as arguement(which must present in the current directory)and locates from your home directory tree all thpath names of its links.Then mail the list to self.
How do I set bash as default shell mac?