conditional statements in bible

This article mainly introduces the detailed interpretation of Ruby in terms of conditional judgment statements, if, else and other logical judgments are the basis of the programming language, the need for friends can refer to the Ruby offers a conditional structure, which is common in modern programming languages. Here, we'll explain all of Ruby's

Working with conditional statements Program execution Use conditional statements and circular statements to control the flow of scripts. Use conditional statements to write VBScript cod

" is a variable that stores the creation date of the record in the database. To connect an entire sentence to understand is to query all records in a database named message, and store all records in the variable SQL with the creation date within 7th of today and today. Probably because the first time you touch the SQL statement, the time can not fully understand its role, but do not worry in future chapters will be dedicated to the author of the use of SQL to introduce you. Through the above stu

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 been able to understand the function in the program, of course, we do not have to die back function, but to be proficient in the use of only a shortcut-more practice. Let's look at the basic syntax of VBScript. A friend w

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 been able to understand the function in the program, of course, we do not have to die back function,

1.JavaScript If ... Else StatementConditional statements are used to perform different actions based on different conditions.1.1 Conditional statementsOften when writing code, you always need to perform different actions for different decisions. You can use conditional statements in your code to accomplish this task.In

Conditional statements in Python, the IF statement is used for conditional judgment, in the following format:If you want to judge the condition:things to do when the conditions are set...It is important to indent in Python, to indent 4 spaces in the run content of the IF condition statement Walkthrough-Judging age Requirements Define an integer variable

This article mainly introduces JavaScript in the conditional Judgment statement use detailed, is the basic knowledge of JS primer learning, need friends can refer to the In writing a program, there may be a situation when you need to take a path out of a given two paths. Therefore, you need to use conditional statements to let programs make the right decisions a

A 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.In Python programming, if statements are used in the execution of control programs, in the basic form:If judgment condition:

Basic syntax and key points for an IF condition statement1 #!/usr/bin/env Python 32 #-*-coding:utf-8-*-3 4 #1, if the basic statement of the nesting5 6 " "7 If conditions are established:8 code block9 Else:Ten code block One " " A #Be sure to note the indentation and the colon after the condition (:) - #indentation in Python is generally based on four spaces, and can be easily entered using the TAB key - the #2, if statement support nesting and again Judge Elif - - " " - If conditions are esta

is judged, and so on.Note: The equals symbol is "= ="You cannot have a condition after elseThere must be a ":" Symbol after the conditionAdd:1) cannot have any Chinese characters in the programFor example: " E:\Python3\1.py ", line 1 if 1 = = 1 : ^ in identifier please press any key to continue ... ^ refers to the wrong place, the ":" Into the English form of the character can be2) If the code block below the IF statement does not want to execute, do not empty, apply the keywor

condition is not reached, like most programming languages, the shell also uses break and continue to jump out of the loop.BreakThe break command allows you to jump out of all loops (all loops after the execution is terminated).#!/bin/Bashi=0while5 ]doi1' if 3 ]thenbreak-e $idoneOperation Result:12In a nested loop, the break command can also be followed by an integer that indicates a loop that jumps out of the first layer. For example:Break nIndicates a jump out of the nth layer loop.ContinueTh

The multiple if of a Java conditional statementIf the multiple if statement is not satisfied with condition 1, the condition 2 is judged, and the code within the Else block is executed when the preceding conditions are not true. For example, if the test score is greater than 90, then an IPHONE 5S is rewarded, and if the score is between 70 and 90, a red meter is rewarded, or 500 push-ups are punished.Syntax: 650) this.width=650; "src=" http://img.muke

-ef FILE2 True If file1 is a hard link to file2.You can add a logical operation in a test statementThe first way of expressionFor example [-o/tmp/test] [-s/tmp/test]: Determine if/tmp/test is all and not empty for the current active userThe second Kind[-o/tmp/test-a-s/tmp/test] here-a means [-o/tmp/test-o-s/tmp/test] here-o means | |[!-o/tmp/test] with! [-o/tmp/test] The results are the same, but! The meaning is different; you can write.Execution result of the commandNormal output resultsExecut

　Cases:if 1=1, then it will output "Hello World" otherwise 　　 Output "Hello penphy" Code block:1 if Conditions: 2 Print("helloWorld")3else:4 ("Error")Note:The indent below the if is also a space, which represents the code block below if. (Indentation is not correct, will be error)1 if 1 = = 1 :2 print("helloWorld")3 Else:4 print ("hello penphy" )　　The 1=1 condition is true, so the second line of code is executed otherwise the condition does not hold the code of line fourth1 if1 =

,-1):... if i%2 = = 0:... print I... break...98 #从99 to 0 steps to 1, the first to meet the conditions to jump out of the loop, and not to print all, if there is no break will print allWhile True/break>>> while True:... word = raw_input (' Enter a word: ')... if not word:... break.. else:The. print ' the word is ' + word #当输入一个值时, will print the value and continue the loop request Enter a If Word does not enter, then jump out of the loopList Deduction---Light-weight loops:>>> [x * x for x in ran

First, if the use of several information1. If basic statementIf 1==1: print (' OK ') #缩进四个字符, you can press the TAB key else: print (' Error ') If 1 = = 1: Print (' A1 ') print (' A2 ') print (' End ') 2.if nestingif1 = = 1: if2 = = 2: Print('A1') Print('A2') Else: Print('A3')Else: Print('A4')3.if elifINP = input ('Please input INP:')ifINP = ='A1' : Print('B1')elifINP = ='A2': Print('B2')elifINP = ='A3': Print('B3')Else: Print('B4')4. Use

1. Judgment and CirculationPython indentMainPrint ("Hello")Print ("Hello world.")if 判断条件: 执行语句elif 判断条件: 执行语句else: 执行语句while 判断条件: 执行语句a = 100while a>1: print(a) a-=1 if a==50: break # 退出循环 if a==55: print("5555555555") continue # 此次循环结束，进入下一个循环Break jumps out of the loopContinue into the next cyclefor item in sequence： 执行语句l = ["a","b","c","d","e","f"]print(l[:])print(l[0:5]) # 大于等于0 小于5 0 2, the programming idea is the most importa