The loop control variable is
initialized after entering the loop
. In some cases, a loop control variable does not have to be initialized. You can either increment or decrement the loop control variable. … It is the programmer’s responsibility to initialize all variables that must start with a specific value.
What happens once your logic enters the body of a structured loop?
Once your logic enters the body of a structured loop,
the e_____ loop body must e______
. Your program can leave a structured loop only at the c_________ that t____ the loop control variable. Commonly, you can control a loop’s repetitions in one of two ways: Use a c______ to create a definite, counter-controlled loop.
What is the first step in a while loop?
- Initialize the loop variable (before the while loop)
- Test the loop variable (in the loop header)
- Change the loop variable (in the while loop body at the end)
Is the loop control variable?
While Loops. The body of the while loop executes only when the logical expression evaluates to be true. Most usually there is a
variable tested in the logical expression
(for example: x<5). This variable is called the loop control variable.
How does a loop control variable function?
The variable count is initialized, tested, and changed as the
loop
executes. It is an ordinary int variable, but it is used in a special role. The role is that of a loop control variable. … You can make counting loops with statements other than the while statement, and not all while loops are counting loops.
What is the significance of updating loop control variable in while loop?
Answer:
The variable count is initialized, tested, and changed as the loop executes
. It is an ordinary int variable, but it is used in a special role. The role is that of a loop control variable.
What are two ways to end a loop?
The only way to exit a loop, in the usual circumstances is
for the loop condition to evaluate to false
. There are however, two control flow statements that allow you to change the control flow. continue causes the control flow to jump to the loop condition (for while, do while loops) or to the update (for for loops).
What are common mistakes made by programmers in coding loops?
Forgetting to initialize and alter the loop control variable
are common mistakes that programmers sometimes make. One set of instructions that operates on multiple, separate sets of data.
When one loop appears inside another the loop that contains?
When one loop appears inside another it is called
an indented loop
.
What is the best strategy for avoiding off by one errors?
Probably the best way to avoid off-by-one errors is
encapsulation
. For example, instead of using a for loop that iterates a collection by index (from 0 to count – 1), use a for-each style loop with all the logic of where to stop built into the enumerator.
What is while loop example?
A “While” Loop is
used to repeat a specific block of code an unknown number of times
, until a condition is met. For example, if we want to ask a user for a number between 1 and 10, we don’t know how many times the user may enter a larger number, so we keep asking “while the number is not between 1 and 10”.
Can any code with a for loop be rewritten with a while loop?
All for loops can be written as while loops
, and vice-versa. Just use whichever loop seems more appropriate to the task at hand. In general, you should use a for loop when you know how many times the loop should run.
What is the difference between while loop and do-while loop explain with example?
do-while loop: do while loop is similar to while loop with the only difference that it checks for the condition after executing the statements, and therefore is an example of
Exit Control Loop
.
What are the 3 types of loops?
Loops are control structures used to repeat a given section of code a certain number of times or until a particular condition is met. Visual Basic has three main types of loops:
for.. next loops, do loops and while loops
.
How many times above loop will be executed?
The
outer loop executes 2 times
and each time the outer loop executes the inner loop executes 3 times so this will print 2 * 3 = 6 stars. The formula for calculating the number of times the inner loop executes is the number of times the outer loop repeats multiplied by the number of times the inner loop repeats.
Which is the loop control variable?
Loop control variables that are
AUTOMATIC
and not used for any other purpose give you the optimal code generation. If a loop control variable is a FIXED BINARY, performance is best if it has precision 31 and is SIGNED.
