All programming languages have a loop capability. Looping is the program logic’s ability to repeat one or more lines of code either: A set number of times, a “for loop” (i.e. 10, 100, 500, 763 or more times) An “unknown” number of times (i.e. loop terminates if a tested condition becomes “true” or as long as the tested condition remains “false”), a “while” loop, a “do until” loop, a “do while” loop. This Lab exercise demonstrates the use of the “For Loop”, a standard loop in all programming languages. C++ standard For Loop format looks like: For (n = 1; n <= 100; n++) { Loop line 1 code; Loop line 2 code; Loop line 3 code; Loop line N code; } The loop code needs: A “loop counter variable” (n in the above example) to keep track of how many iterations this loop has run A starting value (i.e. 1 in the above example) A stop test (i.e. run as long as the loop counter variable is 100 or less in the above example) The loop will start at 1 and increment by 1 until the counter exceeds 100. The loop will then stop at that point. We can substitute variables for the start and stop numeric constant values such as: for (n = 1; n <= NumberofTimes; n++) { Lines of Loop code; } This Lab Assignment will allow the user to: Enter a positive number (we will dispense with GIGO code) Run a For Loop from 1 to N times keeping a running count of the loop iteration values (i.e. 1 + 2 + 3 + 4 + 5 + 6 +…+ N) Display the number of iterations and the total. You might also wish to display the iteration count as the loop progresses: You ran the for loop 5 times 1 + 2 + 3 + 4 + 5 = 15
Types of Loop
Loops are the elements of programming in which a part of code is repeated a particular number of times. Loop executes the series of statements many times till the conditional statement becomes false.
Loops
Any task which is repeated more than one time is called a loop. Basically, loops can be divided into three types as while, do-while and for loop. There are so many programming languages like C, C++, JAVA, PYTHON, and many more where looping statements can be used for repetitive execution.
While Loop
Loop is a feature in the programming language. It helps us to execute a set of instructions regularly. The block of code executes until some conditions provided within that Loop are true.
All
- A set number of times, a “for loop” (i.e. 10, 100, 500, 763 or more times)
- An “unknown” number of times (i.e. loop terminates if a tested condition becomes “true” or as long as the tested condition remains “false”), a “while” loop, a “do until” loop, a “do while” loop.
This Lab exercise demonstrates the use of the “For Loop”, a standard loop in all programming languages. C++ standard For Loop format looks like:
For (n = 1; n <= 100; n++)
{
Loop line 1 code;
Loop line 2 code;
Loop line 3 code;
Loop line N code;
}
The loop code needs:
- A “loop counter variable” (n in the above example) to keep track of how many iterations this loop has run
- A starting value (i.e. 1 in the above example)
- A stop test (i.e. run as long as the loop counter variable is 100 or less in the above example)
The loop will start at 1 and increment by 1 until the counter exceeds 100. The loop will then stop at that point. We can substitute variables for the start and stop numeric constant values such as:
for (n = 1; n <= NumberofTimes; n++)
{
Lines of Loop code;
}
This Lab Assignment will allow the user to:
- Enter a positive number (we will dispense with GIGO code)
- Run a For Loop from 1 to N times keeping a running count of the loop iteration values (i.e. 1 + 2 + 3 + 4 + 5 + 6 +…+ N)
Display the number of iterations and the total. You might also wish to display the iteration count as the loop progresses:
You ran the for loop 5 times
1 + 2 + 3 + 4 + 5 = 15
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