what while loop

There is a certain difference between the PHP do While loop statement and the while, and the difference is that the do is executed first, regardless of whether the condition is true, while the while must be true. A "dol while" loop is a while

The while loop statement in the Swift programming language repeats a target statement as long as the given condition is true. GrammarThe syntax for the while loop of the Swift programming language is: Copy Code code as follows: While

Theoretical part:The loop means that the program executes some statements repeatedly;Whiler loop is a kind of cyclic structure, when it is not known in advance how many times the loop executes, it is necessary to use the while loop; while the

(1) difference between single and double quotes in the shell?? A= "Www.jfedu.net"?? b= ' $A '? Echo $BComments:?Assign the www.jfedu.net to variable A, assign the contents of variable A to the variable B, print out the result of the variable B, and

While statementexecutes the statement repeatedly until the expression evaluates to zero.Grammar while (expression) statement NoteThe expression test occurs before each loop execution, so the while loop executes 0 or more times. An

In js, loops include For loops and while loops. They are not much different, but they will be used more in some places. Next I will introduce you to the usage of JavaScript For While loops. For Number of times a piece of code is cyclically

A list or tuple can represent an ordered Set. What if we want to access each element of a list in turn? such as List:L = [' Adam ', ' Lisa ', ' Bart ']print l[0]print l[1]print l[2]If the list contains only a few elements, it is OK to write, and if

Turn from: Http://blog.chinaunix.net/uid-25880122-id-2901409.htmlwhile loop format While expression Do Command Command ``` Done 1. The counter-controlled while loop is used primarily for the number of data and

# @Time # @File : While loop. pyExample 1:1 n = 02 while True:3 print'Hello World'4 if n = = Ten:5break 6 N +=1Print as follows:1 Hello World 2 Hello World 3 Hello World 4 Hello World 5 Hello World 6 Hello World 7 Hello

This article mainly introduces how to use else and nested loop in the while loop of Python. It is the basic knowledge of getting started with Python. For more information, see Loop using else statements In python,... Else indicates this. The

The while LOOP trap and shellwhile trap in shell When writing A while LOOP, I found a problem. In the while LOOP, I assigned values to variables, Defined variables, array definitions, and other environments, and the environment became invalid

Product Manager learns Python: for Loop, while loop, product manager python Python has two types of loops: for Loop and while loop. 1. for Loop A for loop can be used to traverse an object (traversal: In general, the first element in the loop is

PHP Loop-While Loop Loop executes the number of times specified by the code block, or the loop executes the code block when the specified condition is true. PHP LoopsWhen you write code, you often need to have the same code block run

Need to read a text, the second text each line contains an IP in the while loop using SSH, but after the first line of SSH exited, how to avoid automatically reading a line out of the while loop, this article will explain its reasons in

Let me introduce you to the loop execution for loop in C # In this practice, we'll show you another important circular statement in C #, for loops. for (expression 1; expression 2; expression 3) { loop-body } Expression 1: Generally

The shell, as a scripting language, also contains other program control structures such as loops, branches, and so on, making it easier to perform more complex and powerful functions.Using the FOR Loop statementAt work, you often encounter a task

The while loop is used to continuously execute a series of commands and to read data from the input file; the command is usually a test condition. The format is:While Commanddo Statement (s) to being executed if command is TruedoneThe command

The while loop is used to continuously execute a series of commands and to read data from the input file; the command is usually a test condition. The format is: while Command Do If True done The command finishes, control returns to the top of

The while loop is used to continuously execute a series of commands and to read data from the input file; the command is usually a test condition. The format is:While Commanddo Statement (s) to being executed if command is TruedoneThe command

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