The vb loop statement results in a crash like state, written in do loop, why?

vb. do...loop

The loop itself does not have an end loop condition, no matter what kind of operation is performed in the loop, as long as there are no syntax errors, it will always be executed, if its execution speed is too high, it will always occupy the CPU, resulting in crashes and other system problems; Right. do

For the application of loop, you need to add a conditional statement to end the loop inside the loop, and in addition, you need to set a certain interval for the loop, such as using the delay class "delay".

and so on; Ensure that the CPU has sufficient response time, and if the user needs to perform some ** at high speed, add**.

delay1 (i.e., a delay of 1 millisecond (1 millisecond = 1 1000 seconds)) is better than no addition.

dowhile loop condition.

loop means that when the following loop condition is true.

Execute the ** in the loop body, otherwise jump out of the loop and execute the ** behind the loop;

doloopwhile

Cyclic conditions. Execute the ** in the loop first, and then judge the loop condition, if it is true, continue to execute the ** in the loop, otherwise jump out of the loop and execute the ** behind the loop;

dountil cycle conditions.

loop means that when the following loop condition is false.

Execute the ** in the loop body, otherwise jump out of the loop, and execute the ** behind the loop, please note the difference from the first one;

doloopuntil

Cyclic conditions. Execute the ** in the loop first, and then judge the loop condition, if false, continue to execute the ** in the loop, otherwise jump out of the loop, and execute the ** after the loop, please note the difference from the second one.

For more examples, please see Encyclopedia....loop

do while i>1 'When i>1, the circulating body begins to know the answer.

i=i+1 'Let i increase by one unit at a time.

if i>20 then 'after increasing i, determine whether i is greater than 20exit do', if it is greater than 20, then jump out of the loop (exit do) end if'If not, the judgment statement is bypassed and the loop continues.

loop.

Visual Basic (VB) is a general object-based programming language developed by Microsoft Vision, which is a structured, modular, object-oriented, event-driven visual programming language that includes an event-driven mechanism to assist the development environment. is a language that can be used in Microsoft's own product development.

"Visual" refers to the way to develop a graphical user interface (GUI) - you don't have to write a lot of ** to describe the appearance and position of interface elements, you just need to add pre-built objects to a point on the screen. "Basic" stands for Basic (Beginners All-Purpose Symbolic Instruction Code) language, which is the most widely used language in the history of computing technology.

Visual Basic is derived from the Basic programming language. With a graphical user interface (GUI) and rapid application development (RAD) system, VB can easily connect to databases using DAO, RDO, ADO, or easily create Active X controls for efficient generation of type-safe and object-oriented applications. Programmers can easily build an application quickly using the components provided by VB.

do while i>1 'When i>1, the loop body starts to execute.

i=i+1 'Let i increase by one unit at a time.

if i>20 then 'increase i to determine whether i is greater than 20

exit do 'If it is greater than 20, the jump belongs to the exit do

end if 'If not, the judgment statement is bypassed and the loop continues.

loop.

Such as judgment.

The program of the prime number can be used in a version.

private function fun1(a as integer )as boolean

fun1=true

i=2do while i <= sqr(a)if a/i = int(a/i) then fun1 = false

exit do

loopend function

Xiao Ming is 11 years old, his mother is 43 years old, and he asks how many years later, his mother is three times his age (do it with a do loop).