Original: Shell Two-integer comparison thought version

The idea is to learn the code creation is their own very like the first few lines of logic rigorous

#!/bin/bash
#判断两个整数的大小
Read-p "Please enter two integers a B:" A B
#或者使用a =$1
[-Z "$a"]| | [-Z "$b"]&&{
echo "The number you entered is zero"
Exit 1
}
#输入的值是否为0
Expr $a + &>/dev/null
Retual1=$?
Expr $b + &>/dev/null
Retual2=$?
#判断输入的值是不是整数
Test $RETUAL 1-eq 0-a $RETUAL 2-eq 0 | | {
echo "Variable not an integer does not meet the requirements"
Exit
}
[$a-lt $b] &&{
echo "$a < $b"
Exit 3
}
[$a-gt $b] &&{
echo "$a > $b"
Exit 4
}
[$a-eq $b] &&{
echo "$a = $b"
Exit 5
}

Original: Shell Two-integer comparison thought version