if statement

Presumably everyone knows "if ... So ... " The application of this grammar!Of course, Linux for this kind of usage is also considered, many times we need to write a shell script, it is unavoidable to avoid the IF statement.For example: Determine if

Today, let's talk about conditional judgment statements--ifThe IF statement is used in Python to determine whether the given condition is satisfied, and one of the two actions given is determined by the result of the decision (true or false).form of

If to determine the size of two values -- multi-branch if statement to strictly judge the parameters #! /Bin/bash Print_usage (){ Printf "the number of parameters you entered is incorrect or incorrect. Run the following syntax: \ n" Echo-e "$0 digit

There may be a situation when you want to check other conditions after a condition resolves to true. In this case, you can use a nested if structure. In a nested IF statement structure, you can have another if ... else structure inside an if ...

Ask a question about the if statement in a function. if a Cainiao has similar functions, it is incomplete. just give an example of function & nbsp; p_abc ($ a, $ B, $ c) {& nbsp; $ a & nbsp; xxx & nbsp; if & nbsp; ($ b255) {& ask a question about

Ask for an If statement, thank you. Ask for an If statement, $B different values from $d If the date is in this period April 9, 2012 to July 7, 2012 $b =array (' b00.gif ', ' b01.gif ', ' b02.gif ', ' b03.gif ', ' b04.gif ', ' b05.gif ', ' b06.gif '

If statement The if statement is also called a judgment statement, for example, whether it is correct or not, the ratio size, etc. Let's take a look at the exercise; 1. Start Geany 1) Click "Application-programming-Geany" in the menu to start Geany

The original code should be this way, it is strongly recommended to put the variable behind if (a==b)//If a==b, execute the following code {...} However, in the absence of control of their own agile thinking situation, this error causes the program

Is there any problem with this IF statement? This post was last edited by YouJiWangKeFu from 2013-01-2512: 46: 51 & nbsp; if ($ cutt & nbsp ;=& nbsp; 3) {$ urll & nbsp ;=& nbsp; "http://www.baidu.com"; & is there any problem with this IF statement?

1. If statements are used to judge different conditions and execute different codes depending on the outcome of the judgment.2, if the condition can be judged by the relational operation, the logical operation, if the statement according to the

If the following if statement is availableProgramWill it be compiled? Int X, Y = 10If (x = y) x = y;   I have verified that C and C ++ can be compiled but cannot be compiled in Java, the reason is that a Boolean value must be returned for the

Log on and refresh. in the php script, the js dialog box in the if statement is displayed. if (isset ($ _ POST [user]) & amp; $ _ POST [user] panus) & amp; (isset ($ _ POST [password]) & amp; $ _ POST [password] welcome) & nbsp; {setco login refresh,

If statement error here is part of the screenshot, so we may not pay attention to the size brackets, but now we are always jumping to else and cannot execute the above PHPcode $ SQL & quot; select * from # @__ tgregwhereuser & quot; read the tgreg

Is there any problem with this IF statement? This post was last edited by YouJiWangKeFu from 2013-01-2512: 46: 51 & nbsp; if ($ cutt & nbsp; 3) {$ urll & nbsp; & nbsp; www.baidu.com; & nbsp ;}& nbsp; & nb is there any problem with the IF statement?

Ask a question about the if statement in a function. if a similar function exists in Cainiao, it is incomplete. just give an example of function & nbsp; p_abc ($ a = '', $ B = '', $ c ='') {& nbsp; $ a = & nbsp; xxx & n asked a question about the if

To compile the statement into an if statement... What is the concept of the red-number? $ Keyc = $ ckey_length? ($ Operation = 'decode '? Substr ($ string, 0, $ ckey_length): substr (md5 (microtime (),-$ ck calculate and compile it into the if

If statement error here is part of the screenshot, so the size of the brackets may not be noticed, but now it is always jumping to else, you cannot execute the above PHPcode $ SQL = & quot; select * from # @__ tgregwhereuserid = '$ ID' & quot; if

If statementExample: User login verification, code as follows1 #Define user name password2user ='Tamir'3passwd ='Tamir123'4 5 #define user name password before user enters account password to authenticate6Username = input ("Username:")7Password =

Examples of the format of several control flow statements for Linux:Example of an if statement;#!/bin/sha=10B=20if [$a = = $b]Thenecho "A is equal to B"elif [$a-gt $b]Thenecho "A is greater than B"elif [$a-lt $b]Thenecho "A is less than B"Elseecho

Original address: http://blog.chinaunix.net/uid-24607609-id-2118151.htmlThe syntax for the most streamlined if command is:if TEST-COMMANDS; then CONSEQUENT-COMMANDS; fiafter the Test-command executes and its return status is 0, the