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.

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.