Shell script parsing 7 (Exercise 1) ----- Script Parameters

Source: Internet
Author: User

#! /Bin/bash

A = $1 # pass the first command line parameter to variable A, and the second command line parameter to B

B = $2

If [-Z $ A] | [-Z $ B] # determines whether a and B are empty. If one is empty, print the prompt statement and exit.


Echo "Please enter 2 No"

Exit 1


If [$ A-EQ $ B]; then # determines the size of A and B, and prints the statement based on the judgment result

Echo "number A = number B"

Else if [$ A-GT $ B]


Echo "number A> number B"

Elif [$ A-lt $ B]


Echo "number A <number B"



Execution result:

It is found that if the command line parameter is input more than the number accepted by the program, no error is reported. Programs are allocated as needed.


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