how to if statement

Statement:Branching statements: if,if else,if ElseIf else,switch caseLooping statements: For,while,do While,foreachJump statement: Break,continueException statement: Try Catch finallyBranch statements:int a=5;if (a>0){Console.WriteLine ("This is a

int index; if (index = = 0) { NSLog(@ "11111"); }Else if (index = = 1) { NSLog(@ "2222222"); }Else if (index = =3) { NSLog(@ "3333333"); }......Do we see this kind of code that looks like a little eye ache? If it is you, how will you

To generate a random number using a computer:Random rand = new Random ();//Make a random generator, random(); a random generator seed can be placed inside the parentheses, this seed can only be an integer (int)int n = rand. Next (10); n represents a

Ideas: 1, first understand what is called a two-time equation, when a is not equal to 0, this equation is a two-time equation2, according to the formula Derta=b*b-4*a*c to determine the root of the situation①derta>0, the equation has two unequal

Console.WriteLine ("Please enter the first number:"); intA =Convert.ToInt32 (Console.ReadLine ()); Console.WriteLine ("Please enter a second number:"); intb =Convert.ToInt32 (Console.ReadLine ()); Console.WriteLine ("Please enter a third number:");

public boolean chackyear (int str) {//Judgment Common year, leap yearBoolean q = str% 4 = = 0;Boolean w = str% 100 = = 0;Boolean e = str% 400 = = 0;Boolean r = False;if (q) {if (w = = False | | e) {R = True;}}return R;}Public String Chackday (int

Case LIST:First, judge the day of the monthIdeas: 1, first judge whether the year is correct (12. If the year is entered correctly, determine if the month is correct (13, if the month input is correct, then the judgment Day is correct4, the day is

The trinocular operation is compiled into an if statement ... And the red one, what's the concept? $KEYC = $ckey _length? ($operation = = ' DECODE '? substr ($string, 0, $ckey _length): substr (MD5 (Microtime ()),-$ckey _length)): ";

Help me check whether the code is standard. if statements Judge $ hosturl = $ _ SERVER ['php _ SELF ']; & nbsp; // Obtain the current urlif & nbsp; $ hosturl = "/index. php "& nbsp; // if the URL is equal to/index. php, enter the body field content {

Statement If statement There are several types of data:   Example: (1) determine whether to pay taxes based on monthly income Console. Write ("Enter your monthly income (RMB ):"); Double money = convert. todouble (console. Readline ()); If (money >=

Statement category: I. Sequence Execute programs one by one Ii. Branch If statement -- used to determine conditions, bool type. 1. If () 2.if() 3.if() 4.if () {{{{ }}}} Else () else if () {{{ }}} Else if () {{ }} Else () else () PS: If () can only

1. The if Statement of C ++ uses a comma expression. Description: The comma expression is essentially the same as the addition, subtraction, multiplication, division, and its value is to evaluate the expression from left to right, The result of

From: http:// OS .51cto.com/art/200912/165925_1.htm Location Parameter $1, $2 ,..., $ N, $ # represents the number of parameters in the command line, $0 represents the Script Name, the first parameter represents $1, the second parameter represents $2

Use the if statement to determine parameters in shell programming -B. returns true if the file exists and is a block file. -C: returns true if the file exists and is a character file. -D. If pathname exists and is a directory, true is returned. -E:

Python learning: if statement and pythonif statement Example: age = 20if age >= 18 : print 'Adult'elif age A computer can perform a lot of automated tasks because it can perform conditional judgment on its own. For example, input the user's

About the = Operator and if Statement of js As we all know, these two are related to boolean values. The operator = returns a Boolean value, and the if () or ternary operator? : Boolean values are determined. In js, The = Operator and = operator are

Use the if statement to determine parameters in shell programming -B. returns true if the file exists and is a block file. -C: returns true if the file exists and is a character file. -D. If pathname exists and is a directory, true is returned. -E:

An IF statement cannot be found for one day. The code is as follows: If ($ webstate! = "Y" or $ webstate! = "N") {echo "script" alert ('prompt: illegal error! Error Code: State! '); History. back (-1); script "; exit ;} My idea is: $ is only

Ask in the IF statement! And empty is not the same; $a =array (); $a = "; $a = "0"; $a =null; ... if (empty ($a)) = = = if (! $a); Recently see thinkphp Framework code, in the judgment statement, used a lot of empty () without!; Ask: The

Tag: The value of the radio button uses other data find null 12px the target likeMay 28, 2017, sunny, the mood is also good. Last night and colleagues in the string, back to continue the whisky walk, drink until 2 o'clock in the morning, chat very