Day 4: loop structure (while, do... While, ),... While1. Loop Structure (while, do... While,)
1.1. What is a loop structure
In daily life, there will be a lot of things that need to be done repeatedly, such as four seasons of every year, 7 days of
1. Loop Structure (while, do... While,)
1.1. What is a loop structure
In daily life, there will be a lot of things that need to be done repeatedly, such as four seasons of every year, 7 days of every week, 3 meals a day, and 50 copies of each
First, Introduction
In shell programming, circular commands are used to control the execution of certain statements under certain conditions, with three commonly used loop statements: for, while, and until. While loops and for loops belong to the
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
------Java Training, Android training, iOS training,. NET training, look forward to communicating with you! -------"Loop Structure"1 , circular structure Introduction:Loops are executing the same block of code again and again2. Several conditions
[TOC]One, for loopRepeated execution of a series of commands is common in programming. Usually you need to repeat a set of commands until you reach a certain condition, such as working with all the files in a directory, all users on the system, or
The main contents of this section:
If-else Process Judgment
For loop
While loop
Reference pages
If-else process Judgment If statement overviewComputers can do a lot of automated tasks, because it can make their own
OneLoop statements (there are two types):While statementFor statementWhile statement:Problem: Enter an integer n to allow the program to output n rows:Hello 1Hello 2.......Hell NWhile statement:Function: Executes a statement or multiple statements
A Bash Script: A while loop in the Loop Structure
Like other languages, the Bash loop structure also contains the while statement.Basic Structure
While condition do loop body done
Like the for statement, its loop body is also do... Done structure.
The loop structure in PHP has roughly a for loop, while loop, do{} while loop and several foreach loops, regardless of the loop, in
There are several ways to jump out of a loop in PHP:Code:
Copy CodeThe code is as follows:
$i = 1;
while (true)
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