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Find the biggest number in Shell Script

By: Vivek G in Linux Tutorials on 2011年01月29日 [フレーム]

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ドル: number1 number2 number3 are not given" >&2
 exit 1 
 fi
 n1=1ドル
 n2=2ドル
 n3=3ドル
 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ドル -eq 2ドル ] && [ 1ドル -eq 3ドル ] && [ 2ドル -eq 3ドル ]
 then
	echo "All the three numbers are equal" 
 else
 echo "I can not figure out which number is biger" 
 fi 



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