This document discusses different types of loops in computer programming including for loops, nested for loops, while loops, repeat loops, and the break and next keywords. For loops are entry-controlled and iterate over a known sequence. Nested for loops run multiple inner loops within an outer loop. While loops are also entry-controlled but are used when the number of iterations is unknown. The break keyword exits a loop entirely, while next skips the current iteration. Repeat loops run continuously until a break condition is encountered.

1. - R. M. Dharaneesh

2.  Loops
 For loops
 Nested for loops
 While loops
 break
 Repeat loops
 next

3.  In computer programming, a loop is a sequence of instructions that are
continually repeated until a certain condition is reached.
 Loops can either be entry-controlled or exit-controlled.
 Entry-controlled loops run only if the condition for the looping process stays true.
 Exit-controlled loops run at least once, regardless of the condition, conditions are
checked for only at the end of the loop block.

5.  For loops are an entry-controlled type of loops, i.e., conditions are given on the
entry of the loop.
 If the conditions are not satisfied, then the loop doesn't execute.
 Otherwise, the loop runs until the condition becomes false.
 It is used to iterate over the items of a sequence, usually only when the range of
the sequence is known.
 Update statements are not needed as the loop automatically updates the counter
variable.

7.  For loops can be nested, i.e., for loops can be placed inside of other for loops.
 If for example, the outer loop will make 'm' iterations and the inner loop will make
'n' iterations, then the total number of iterations made will be m * n.

9.  While loops are another entry-controlled type of loop in R.
 While loops are usually used when the total number of iterations are not known,
although they can also be used when the number of iterations are known.
 Update statements have to be explicitly mentioned in while loops.

11.  The 'break' keyword is used to 'break' out of a loop abruptly in between its
execution.
 Once a 'break' statement is encountered in a loop, the control exits out of the loop
completely.

12.  It is a simple loop that will run the same statement or a group of statements
repeatedly until the stop condition has been encountered.
 Repeat loop does not have any condition to terminate the loop, a programmer
must specifically place a condition within the loop’s body and use the declaration
of a break statement to terminate this loop.
 If no condition is present in the body of the repeat loop then it will iterate
infinitely.

14.  The 'next' keyword is used to skip the current iteration in a loop.
 Once the 'next' keyword is encountered in a loop, the control will instantly skip
that iteration.

16. Thank
you