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 a loop variable.

for…in expression

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

while…do loop

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

nested loops

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