Different types of loops
JavaScript supports different types of loops:For-loop code block a certain number of timesFor/in-Looping through the properties of an objectWhile-loops the specified code block when the specified condition is trueDo/while-also loops the specified code block when the specified condition is trueFor loopA For loop is a tool that you will often use when you want to create a
In this chapter, we will explain the "for" loop in the PHP loop control statement.
The For loop is a complex looping structure in PHP, which has three expressions. Syntax Format as follows:
for (EXPR1; expr2; expr3) { statement;}
Syntax Explanation:
The first expression, EXPR1, is executed only once at the beginning of a
syntax for a looping statement
Do { statement} while (expr);
Syntax Explanation:
As you can see from the syntax, our conditional expression is placed behind the PHP statement statement, which means that no matter whether the expr expression is true,do...while, the loop executes at least once.
Now, let's do...while the flowchart of the loop statement.
Do...while Loo
the expression expr is always true, the loop will be executed forever, which forms a dead loop, which is not allowed by our program. Think of code like the following
The while condition is 1, which is always true, so it will continue to loop, is a dead loop, causing the page to crash
While
Simple example of phpwhile loop control, phpwhile loop instance. A simple example of phpwhile loop control. a while loop instance of phpwhile loop is the simplest
This section describes a special looping statement in PHP, the "foreach" loop statement.
What is a foreach loop for?
In PHP, the Foreach Loop statement, which is designed to iterate through an array, can be viewed in this article http://www.php.cn/php-weizijiaocheng-360217.html
foreach Loop syntax format
The Foreach
Linux while loop and for loop code example introduction, linuxwhile
There are three types of loops in the script, which can be divided into two types: while LOOP and for loop.1. while Loop
The while
Example of smarty loop nesting Usage Analysis and smarty loop nesting examples
This example describes the usage of smarty loop nesting. We will share this with you for your reference. The details are as follows:
Test3.php:
The sample is written as follows:
Templates/test3.h
Loop ExitFor loop:ForElseThe For loop will execute the ELSE statement if it ends normally.Script 1:#!/usr/bin/env python for I in Xrange (10):Print IElse:Print "Main End"Results:[email protected] 20171227]# python exit.py0123456789Main end[Email protected] 20171227]#Script 2:#!/usr/bin/env pythonImport timeFor I in Xrange (10):Print ITime.sleep (1)ElsePrint "Main End"Result: (Press CTRL + C interrupt)[email
PHP simple implementation of cyclic linked list function example, php loop example
This example describes PHP's simple implementation of the Circular linked list function. We will share this with you for your reference. The details are as follows:
Overview:
Cyclic linked list is another form of chained storage structur
An example of enumeration application is as follows: the name and path of a special folder are output through loop traversal ., Enumeration example
You can use the Environment. GetFolderPath (Environment. SpecialFolder folder) method to obtain the path of a special folder in the current windows system. Then, how do I pass in different enumerated values and execu
Example of using php loop statement to control break and continue
This article describes how to use php to jump out of the loop break and skip a certain layer of loop continue. For more information, see.This article will show you how to use break and continue and their functions in
the condition is not satisfied, to end the loop3.for CycleCode format: for (expression 1; loop condition; expression 2) { // loop Body }Flow chart:Interpretation:Run an expression 1To determine if the loop condition is true, if true, then execute the loop body, run the expression 2 after execution, and then judge t
beginning of the internal iteration. In (3),Continue Label1Interrupts both internal iterations and external iterations, and goes directly toLabel1Then, it actually continues the iterative process, but begins with an external iteration. In (4),Break Label1Also interrupts all iterations and returns to theLabel1But does not re-enter the iteration. In other words, it is actually completely aborted by two iterations. Sample source below is a label for forLoops and whileExamples of loops:Package Com.
the variable with the value 1. We have the set of the condition, which in we are to not count odd numbers greater than, and the final one is the pace, a nd since the closest odd numbers only differ by 2 the final expression is i+2 . Notice that we start the loop with an odd number.removing forLoop ' s clausesOne-to-put for loops in good use would is to optimize them, by removing the expressions. Each one of them can is omitted, or you can even omit t
This article mainly describes Python in the use of the For loop in the process of shredding, the need for friends can refer to the following
Why challenge yourself not to write a for loop in your code? Because it can force you to use more advanced, authentic syntax or libraries. In this article, we take Python as an example, and say a lot of people have actually
=" Qq20151022224005.png "alt=" Wkiom1yo9s2ruyg4aadxaiede5q703.jpg "/>After modification, the code no longer has a dead loop. Next, we recognize what a dead loop is."Dead cycle" means the endless execution of the program, in any case can not jump out of a phenomenon of the loop body. At present, there seems to be no algorithm, for any program can be judged whether
thinkphp template loop output volist Label usage example, thinkphpvolist
This article describes the thinkphp template looping output volist label usage. Share to everyone for your reference, as follows:
The Volist label is used to loop the output dataset or multidimensional array in the template.
Volist Label
In the module operation, the Select () method returns
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