Shell Two integer judgment size thought version

Like the rigor of the thought logic of the first few lines

The logic is to learn the code creation is own

#!/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

}

Shell Two integer judgment size thought version