Find the biggest number in Shell Script
By: Vivek G
This shell script shows how to find the biggest number from three given numbers. The algorithm is as follows:# 1) START: Take three nos as n1,n2,n3. # 2) Is n1 is greater than n2 and n3, if yes # print n1 is bigest no goto step 5, otherwise goto next step # 3) Is n2 is greater than n1 and n3, if yes # print n2 is bigest no goto step 5, otherwise goto next step # 4) Is n3 is greater than n1 and n2, if yes # print n3 is bigest no goto step 5, otherwise goto next step # 5) END
if [ $# -ne 3 ]
then
echo "$0: number1 number2 number3 are not given" >&2
exit 1
fi
n1=$1
n2=$2
n3=$3
if [ $n1 -gt $n2 ] && [ $n1 -gt $n3 ]
then
echo "$n1 is Bigest number"
elif [ $n2 -gt $n1 ] && [ $n2 -gt $n3 ]
then
echo "$n2 is Bigest number"
elif [ $n3 -gt $n1 ] && [ $n3 -gt $n2 ]
then
echo "$n3 is Bigest number"
elif [ $1 -eq $2 ] && [ $1 -eq $3 ] && [ $2 -eq $3 ]
then
echo "All the three numbers are equal"
else
echo "I can not figure out which number is biger"
fi
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