Question: Why Is It Called A For Loop?

Can a for loop be declared in another for loop?

Yes you can use the same counter variable name for an inner for loop as for the outer for loop..

How do you make a for loop?

The for-loop follows four steps:Init. The init code runs once to set things up at the very start of the loop. … Test. The boolean test is evaluated. … Loop-body. If the test was true, the body runs once. … Increment. Finally, the increment code executes just after the body, and then the program loops back to the test, (step 2).

What does I stand for in a for loop?

edited Dec 30 ’14 at 0:33. Up vote 2. i is just a name chosen for the variable that holds the current array index in each loop iteration. This is not hard coded, you can choose any name you want: for someOtherName in range (0, 5): print someOtherName.

What are the 3 parts of a for loop?

Similar to a While loop, a For loop consists of three parts: the keyword For that starts the loop, the condition being tested, and the EndFor keyword that terminates the loop.

How does a for loop work?

After the body of the ‘for’ loop executes, the flow of control jumps back up to the increment statement. … If it is true, the loop executes and the process repeats itself (body of loop, then increment step, and then again condition). After the condition becomes false, the ‘for’ loop terminates.

What’s the difference between for loop and while loop?

Use a for loop when you know the loop should execute n times. Use a while loop for reading a file into a variable. Use a while loop when asking for user input. Use a while loop when the increment value is nonstandard.

What does a for loop do?

In computer science, a for-loop (or simply for loop) is a control flow statement for specifying iteration, which allows code to be executed repeatedly. … For-loops are typically used when the number of iterations is known before entering the loop.

What are the four components of loop?

Loop statements usually have four components: initialization (usually of a loop control variable), continuation test on whether to do another iteration, an update step, and a loop body.

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.

What does [] in python mean?

[] is an empty list. [] is creating a new list ( [] ) with as the first item in the list, which can then be referenced by its index: var = [] var[0] == # returns True. So your guess that your assignment of foo. bar = [1,2] is exactly right.

What is Loop example?

A loop is used for executing a block of statements repeatedly until a particular condition is satisfied. For example, when you are displaying number from 1 to 100 you may want set the value of a variable to 1 and display it 100 times, increasing its value by 1 on each loop iteration.

When should I use a for loop?

A “For” Loop is used to repeat a specific block of code a known number of times. For example, if we want to check the grade of every student in the class, we loop from 1 to that number. When the number of times is not known before hand, we use a “While” loop.