ion loop

// 1. Unicom Figure 2. If the vertex degrees are even, there is an Euler loop. # Include

Yesterday, my colleague asked me a question. There are two loop statements: For (I = N; I> 0; I --){...} For (I = 0; I {...} Why is the former faster than the latter? My explanation at the time was: I -- the operation itself will affect CPSR (currentProgramStatus Register), CPSR common signs are N (result is negative), Z (result is 0), C (input), O (overflow ). I> 0, which can be determined directly by the Z mark. The I ++ operation also a

The data table fields are the ID Name field below the value has 1 32 Li 43 Wang 54 Li four I want to implement the Foreach loop output name value But John Doe output only once

things 2If condition 2:Meet the conditions 2 do things 1Meet the conditions 2 do things 2#下面是一个小应用猜拳游戏:Here is the method used by the Python3 input if else print randomImport RandomPlayer = input (' Please Enter: Scissors (0) stone (1) cloth (2): ')Player = Int (player)#产生随机整数: One of 0, 1, 2Computer = Random.randint (0,2)#用来进行测试Print (' player=%d,computer=%d ', (player,computer))if (player = = 0) and (computer = = 2)) or ((Player ==1) and (computer = = 0)) or ((player = = 2) and (computer = =

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

A For loop is nested similar to if else Case:Print matrixfor (int k = 1; k {for (int i = 1; I {Console.Write ("");}Console.WriteLine ();} Print triangle with right angle at bottom leftfor (int i = 1; I {for (int j = 1; J {Console.Write ("");}Console.WriteLine ();} The upper left corner is a rectangular trianglefor (int i = 1; I {for (int j = 5; J >= i; j--){Console.Write ("");}Console.WriteLine ();} The bottom right corner of the print triangle is

Tags:aclbegin loops combms oradeclarenbspsize sql> declare 2 I number: = 0; 3 begin 4 loop 5 dbms_output.put_line (i); 6 I: = i+1; 7 exit when i = ten; 8 end loop; 9 end; / 0 1 2 3 4 5 6 7 8 9 PL/SQL procedure successfully completed. sql> declare 2 I number: = 0; 3 begin 4 loop 5 I: = i+1; 6 dbms_ou

A dead loop was encountered while porting a Windows program to Linux, and finally a statement similar to this was located for (i = 0; i Don't ask me who wrote it, why do you write it so ( tear eyes !) ).According to the common sense of c, i = i++ should be equivalent to i++, it is true on Windows, but Linux is not, this should be caused by compiler differences.---------------------------------------Split-line no.0-------------------------------------

Until cycleThe environment used to perform loops when a proposition is falseWhen a proposition is false, it enters the loop; exit the loop when the proposition is trueOr if the condition is not satisfied, enter the cycle of the sceneIn logical judgment, until and while are just the opposite.Syntax format:Until CONDITION; DoLoop bodyDoneEntry condition: CONDITION is FalseExit Condition: CONDITION is TrueUnti

Scene: When you import more than one piece of data through Excel (insert multiple data at once into the database), to read, parse Excel, and loop into each piece of data, before inserting a piece of data to determine whether the data already exists, if there is a continue exit the current loop, into the next cycle. For example: Break : Jump out of the loop for