Fortran 简明教程
Fortran - Loops
在某些情况下，您需要多次执行代码块。通常，语句按顺序执行：函数中的第一个语句首先执行，其次是第二个语句，依此类推。
There may be a situation, when you need to execute a block of code several number of times. In general, statements are executed sequentially : The first statement in a function is executed first, followed by the second, and so on.
编程语言提供了各种控制结构，允许执行更复杂的路径。
Programming languages provide various control structures that allow for more complicated execution paths.
循环语句允许我们多次执行一个语句或一组语句，以下是大多数编程语言中循环语句的一般形式 −
A loop statement allows us to execute a statement or group of statements multiple times and following is the general form of a loop statement in most of the programming languages −
Fortran 提供以下类型的循环构造来处理循环要求。单击以下链接以查看其详细信息。
Fortran provides the following types of loop constructs to handle looping requirements. Click the following links to check their detail.
Sr.No |
Loop Type & Description |
1 |
do loopThis construct enables a statement, or a series of statements, to be carried out iteratively, while a given condition is true. |
2 |
do while loopRepeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body. |
3 |
nested loopsYou can use one or more loop construct inside any other loop construct. |
Loop Control Statements
循环控制语句改变了它在正常序列中的执行。当执行退出一个作用域时，在该作用域中创建的所有自动对象会被销毁。
Loop control statements change execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.
Fortran 支持以下控制语句。单击以下链接以查看其详细信息。
Fortran supports the following control statements. Click the following links to check their detail.
Sr.No |
Control Statement & Description |
1 |
exitIf the exit statement is executed, the loop is exited, and the execution of the program continues at the first executable statement after the end do statement. |
2 |
cycleIf a cycle statement is executed, the program continues at the start of the next iteration. |
3 |
stopIf you wish execution of your program to stop, you can insert a stop statement |