Is the loop structure in VB fast with the for statement or the do loog statement?

After compiling to local, the fornext and doloop loops (including all other loops) use the same local **. The main reason for the speed difference between cycles is the execution speed of the cycle body**. If the circulation is very short (or even none), then as it was said upstairs, it depends on the conditions for exiting the loop.

However, it is important to note that the "exit condition" here refers to a simple sentence like a < b, such as.

do loop while custom function() = true

In such a loop, the execution time of the custom function () should be counted in the time consumed by the loop body.

So there is basically no difference in the execution speed of the loop structure itself (because the compilation results in the same local **), and if I have to say, theoretically doloop is slightly faster (imperceptibly) than fornext

This is because at compile time for fornext, the compiler will use the doloop loop after the value of the added variable increases (i=1 to 10) and the exit condition is compared (if i=11 it exits the loop).

This also explains why DoLoop can emulate ForNext but ForNext can't

This is related to the number of loops to be looped and the algorithm.

For the same loop, the speed of the cycle depends on the test of the termination loop condition, the abort condition test of the for loop only compares the size of the two numbers, and the test of the do loop is often only the comparison of the size, and even has other operations or tests, so from this point of view, the for loop should be faster than the do loop.

Of course, this is my personal understanding and does not represent authority.

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.