ion loop

While loop calculation rules: inner loop-outer loop !, While rule Num = 1 # value = 1While num Print (num) # The value of this 1 should be printedNum + = 1 # num + = 1 is equivalent to num plus 1, so this value is 2 in total.If num = 6: # if the program is terminated for 6, if it is not up to 6, the program will go over again until it reaches 6.BreakFor example:W

--------the 2nd kind of--------while ...Loop END Loop;Declare n Number (3): = 1; Begin while nLoop Statement 2nd while ... Loop END Loop;

While loop structureWhile condition-determining expressionDoStatement blocks executed when the condition is judged............DoneExample: Using while to output a number 1 to 10 (ascending output)J=1While [$j-le 10]Do#useradd wsyht$j#userdel-R wsyht$iEcho $jLet J + + #j =j+1DoneC-FOR Cycle Structurefor (assigning initial value; condition judgment; step))DoActions performed when the condition is judged......DoneFor ((i=1;iDoecho "$i"Sleep 1Done>=>Until

Tags: declare end Conditional statement OOP exit database condition number BERLoops Loop statement:1: GrammarLOOPThe statement to execute;Exit when END LOOP;Where: The EXIT when clause is required, otherwise the loop cannot be stopped.2: ExampleDeclareint number (2): = 0;BeginLoopint: =int+1;Dbms_output.put_line (' int ' value is: ' | | int);Exit when int = 10;En

1. Map loopLet Arr=[1,2,3,4];arr.map (function (Value,key,arr) {//value, index, array (default = selected array) return item; Returns an array of all undefined if no return, number is index +1 (key+1)})//returns an array2. Foreach LoopLet Arr=[1,2,3,4];arr.map (function (Value,key,arr) {//value, index, array (default = selected array) return item; Do anything})//return only undefined3. Filter loopLet Arr=[1,2,3,4];arr.map (function (Value,key,arr) {//value, index, array (default = selected

Package Practicego;import java.util.scanner;/* 3. The number of times the loop executes is determined by the value entered, and the loop variable starts from 1 by default */public class Cto {public static void main (S Tring[] args) {Scanner sc = new Scanner (System. in); System.out.println ("Please enter the number of cycles:"), int time = Sc.nextint (), for (int i=1; iTest:Please enter the number of cycles

CONTINUE back to loop start/BreakJump out of the loop. The following is a simple example:1>DECLARE2> @testvalueAsINT;3> BEGIN--Set Variable initial value = 04> SET @testvalue = 0;--When the variable is less than 5 cycles5>While@testvalue 6> BEGIN--Variable increment7> SET @testvalue = @testvalue + 1;--if the variable = 2, then return to the beginning of the loop8>IF@testvalue = 29> BEGIN10> CONTINUE;11>END;

type , that is . Change it. foreach($arr as $key=>$value){ $arr[$key]=preg_replace("/href=\"\//i",'href="'.$link,$value); echo $arr[$key]."";//此处$value为替换之后的值。 } You just did a replace operation on the local variable $value in the loop, and did not return the value to $arr. foreach($arr as $key => $value){ $value=preg_replace("/href=\"\//i",'href="'.$link,$value); $arr[$key] = $value; ech

#循环, Traverse, iterate# for Loop, while loopSee Data typesType (name) intBreak no matter whether the loop is complete or not, end the loop immediatelyContinue end this cycle and proceed to the next cycleOne, while loop# while loop, must have a counter# The

1, first need a test table data student2. Normal circulation1) Cycle 5 times to modify student table information--Looping through modification records--DECLARE @i intSet @i=0While @iBeginUpdate Student Set demo = @i+5 where [email protected]Set @[email protected] +1End--View Results--SELECT * FROM Student2) query results after execution3. Cursor loop (no transaction)1) Modify the information according to the actual data of the student table---cursor

SQL often uses loops, and here's a look at common loops and cursor loops1, first need a test table data student2. Normal circulation1) Cycle 5 times to modify student table information--Looping through modification records--DECLARE @i intSet @i=0While @iBeginUpdate Student Set demo = @i+5 where [email protected]Set @[email protected] +1End--View Results--SELECT * FROM Student2) query results after execution3. Cursor loop (no transaction)1) Modify the

Tags: case Yun loop file sleep variable top carriage return while20.10 for Loop Syntax: for variable name in condition; Do ...; Done ;案例1[[emailprotected] shell]# cat for.sh#!/bin/bashsum=0for i in `seq 1 100`do sum=$[$sum+$i]doneecho $sum#输出的结果[[emailprotected] shell]# sh for.sh 5050 File list loop [[emailprotected] shell]# cat for

One, while loopInstance: Public class test{ publicstaticvoid main (string[] args) { int i = 1; while (i) { System.out.println (i); I+ +; }}}Second, Do-while cycle Public class test{ publicstaticvoid main (string[] args) { int i = 1; Do { System.out.println (i); I++ ; } while (i); // Do-while Loop, first executed once, and then in

Label:1. While LoopDELIMITER $$DROP PROCEDURE IF EXISTS' Sp_test_while ' $$CREATE PROCEDURE' Sp_test_while ' (inchP_numberINT, #要循环的次数inchP_startidINT#循环的其实值)BEGIN DECLAREV_valINT DEFAULT 0; SETV_val=P_startid;outer_label:BEGIN#设置一个标记 whileV_valP_number DoSETV_val=V_val+1; IF(V_val= -) ThenLEAVE Outer_label; #满足条件, terminates the loop, jumps to the end Outer_label tagEND IF;END while; SELECT 'I'm the while outside, the SQL inside the Outer_label'#由

You can use the Loop statement to loop through the data in PL/SQL, which allows you to loop through the specified sequence of statements. The common Loop Loop statement consists of 3 types: basic loop, while ...

Label:You can use the Loop statement to loop through the data in PL/SQL, which allows you to loop through the specified sequence of statements. The common Loop Loop statement consists of 3 types: basic loop, while ...

Loop structure (1), loop structure ( Loop Structure: The loop structure is not endless and will continue only when certain conditions are met. It is called a "loop condition ". when the cycle condition is not met, the loop exits.

I want to learn about the javascript for Loop and... in loops, which are objects that are iterated in JavaScript in two ways. This article will learn for loops and... if you are interested in the in loop, you will know that there are two methods to iterate objects in JavaScript: For loop; For... in loop; I. for

Introduction to the for loop, while loop, and 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

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 the list contains 10,000 elements, we cannot write 10,000 lines of Print.This is where the loop comes in Handy.The python for Loop can then iterate over each ele