conditional statements in bible

The simplest conditional statement: If expression: expr_true_suite As above, if is a keyword and expression is a conditional expression, conditional expressions support multiple conditional judgments, can be concatenated with Boolean operators and, or, and not, Expr_true_suite is a code block, expression is true,

. Different systems may have different locations for the interpreter, so this approach allows the code to be more portable. Yes, the above is for Unix series operating systems. On the system with Windows, this phrase is not present. In conditions, the various conditional operation expressions mentioned in the previous section, if True, execute the statement under that condition. Ternary operatorTernary operation, is a relatively concise method of assi

#-*-Coding:utf-8-*-var = if (var = =): print "Variable var value is" print "good bye! " Like this, the output will be as follows: The value of variable var is 100Good bye! (If statements can be judged with > (greater than), The above is the Python conditional statement of the other two cases, combined with two of the previous article, a total of four cases of Python

The conditional judgment statement in the shell is an upgrade to the previous "conditional test statement in the shell", meaning that the preceding test statement serves the IF~THEN~FI statement for the current judgment statement.We're still rolling it out in the form of attention points and code implementations:1) The basic IF-THEN-FI statement can be used to judge the basic single-layer branching structur

1. If The IF structure is one of the most important features in many languages, including PHP, which allows code snippets to be executed on a conditional basis. The IF structure of PHP is similar to the C language: if (expr)Statement As defined in the chapter of an expression, expr evaluates in Boolean. If the value of expr is true,php the statement will be executed and if the value is false-statement will be ignored. For more information about whic

VB tutorial> Lesson 7 use conditional statementsControlProgramRun Conditional statements and cyclic statements can be used to control the script process. You can use conditional statements to write VBScript for judgment and repe

above example, we use the condition $ today = Sunday. Remember that the equal operator (=) is different from the value assignment operator (=. If $ today is equal to Sunday, the condition $ today = Sunday is true, and the echo statement is executed. if the condition is not true, the conditional expression returns false, the echo statement will not be executed. Generally, depending on the action of an if statement, we may want to execute multiple

In this article we have some knowledge of conditional statements, and the Python conditional statement determines the code block that executes by executing the result of one or more statements (true or false). The Python program language specifies any non-0 and non-null (NULL) values of true,0 or NULL to FALSE. pythoni

This article will not be regularly updated, reproduced please indicate the source http://blog.csdn.net/uxyheaven/article/details/47780957Optimization of conditional statements in Objective-cAsk to judge a nsarray to have value, rigorous wording is NSString *object = @""; if (object [objectclass]] ((NSArray *)object0) { NSLogDD }First judge this object non-empty, then judge is Nsarray ty

A python conditional statement determines the code block that executes by executing the result of one or more statements (true or false). You can easily understand the execution of conditional statements by: The Python program language specifies any non-0 and non-null (NULL) values of true,0 or NULL to FALSE. In Pyth

if (condition) StatementThe condition in the condition statement at this point is that it needs to be enclosed in parentheses. In fact, the conditional statements in Java are the same as in C + +. Java often wants to execute multiple statements when a condition is true. At this point, we will introduce a concept, that is, "block statement", the specific format is

the database. The whole sentence is understood by querying all the records in the database named message, and storing all the records in the variable SQL that were created in today and 7th before today. Perhaps because of the first contact with SQL statements, a time can not fully understand its role, but do not worry in the future chapters of the author will be devoted to the introduction of the use of SQL. Through the above study, we should have b

1. Simple if statementIf, else belongs to the conditional branchif (condition) {EXECUTE statement}else{EXECUTE statement}Points:Program FlowSequential executionSelect ExecuteLoop executionConditional branching statements are used to select the execution2. Multiple if, Else statementsGrammarif (condition 1) {This block of code is executed when the condition is met 1 o'clock}else if (condition 2) {This block

Base: 1. The first sentence of Python usage Python does not limit the suffix name, it can be arbitrary When importing a module, if it is not a. py file (the file suffix later is py) Usage of 2.input: Wait forever until the user enters a value. The input value will be assigned to one thing. 3. Variable Name: -Alphabet -Digital -Underline PS: numbers cannot begin; It is not a keyword; it's best not to repeat what Python has built-inKeywords: ['

-gt10]]+letsum+=i+leti+++ ' [' 2 -eq5 '] ' +echo11+[[2-gt10]]+letsum+=i+ leti+++ ' [' 3-eq5 '] ' +echo33+[[3-gt 10]]+letsum+=i+leti+++ ' [' 4-eq5 '] ' +echo 66+[[4-gt10]]+letsum+=i+leti+++ ' [' 5-eq 5 '] ' + break[[emailprotected]bashtest]# While CONDITION; Do......if CONDITION2; ThenContinue [n]Fi......Done650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/73/6A/wKiom1X886qRcGnTAAI90JruBr0002.jpg "title=" Qq20150919133300.jpg "alt=" Wkiom1x886qrcgntaai90jrubr0002.jpg "/>Dead Loop:While

. Python is indented to represent the code block, so it looks like the code is very organized, such as the above example, if it rains tomorrow, then tomorrow will bring an umbrella, tomorrow with an umbrella is equivalent to the son of if, so you can also think that there is a parent-child relationship, write an example of the actual point, as follows: 123456789 score = Int (input (' Enter your score: ')) #接收输入, because input receives a string, you need to force the t

Count : if count = = 8: pass Else : Print(count) = Count +12. Ask for 1-100 and.n = 1= 0 while n : = s + n Print (s) = n + 13, ask 1-100 all the oddn = 1 while n : = n%2 if temp = = 0: pass else: print(n) = n + 14. Ask for 1-100 all evenn = 1 while n : = n%2 if temp = = 0: Print (n) Else : Pass = n + 15, 1-2+3-4+5-6+7...99 all the numbers andn = 1= 0 while n := n 2 if temp = = 0: = s-

The conditional judgment statement in the shell is an upgrade to the previous "conditional test statement in the shell", meaning that the preceding test statement serves the IF~THEN~FI statement for the current judgment statement. We're still rolling it out in the form of attention points and code implementations: 1) The basic IF-THEN-FI statement can be used to judge the basic single-layer branching struc