Swift - Loops

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.

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. Following is the general from of a loop statement in most of the programming languages −
Swift programming language provides the following kinds of loop to handle looping requirements. Click the following links to check their detail.

S.No	Loop Type & Description
1	for-in This loop performs a set of statements for each item in a range, sequence, collection, or progression.
2	for loop Executes a sequence of statements multiple times and abbreviates the code that manages the loop variable.
3	while loop Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.
4	do...while loop Like a while statement, except that it tests the condition at the end of the loop body.

Loop Control Statements

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.
Swift supports the following control statements. Click the following links to check their detail.

S.No	Control Statement & Description
1	continue statement This statement tells a loop to stop what it is doing and start again at the beginning of the next iteration through the loop.
2	break statementTerminates the loop statement and transfers execution to the statement immediately following the loop.
3	fallthrough statement The fallthrough statement simulates the behavior of swift switch to C-style switch.