F# - Loops

Programming languages provide various control structures that allow for more complicated execution paths.

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 −

Loop Statement

F# provides the following types of loops to handle the looping requirements.

Sr.No Loop Type & Description

for… to and for… downto expressions

The for...to expression is used to iterate in a loop over a range of values of a loop variable. The for… downto expression reduces the value of loop variable.


for … in expression

This form of for loop is used to iterate over collections of items i.e., loops over collections and sequences


While…do loop

Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.


nested loops

You can use one or more loop inside any other for or while loop.