What Is While Loop Example?

What is difference between for loop and while loop?

The ‘for’ loop used only when we already knew the number of iterations.

The ‘while’ loop used only when the number of iteration are not exactly known.

If the condition is not put up in ‘for’ loop, then loop iterates infinite times.

If the condition is not put up in ‘while’ loop, it provides compilation error..

Which is better while loop or for loop?

As for infinite loops for(;;) loop is better than while(1) since while evaluates every time the condition but again it depends on the compiler. Depends on the language and most likely its compiler, but they should be equivalent in most languages. It shouldn’t matter which is faster.

How does a for loop start?

The For Loop Statement 1 is executed (one time) before the execution of the code block. Statement 2 defines the condition for executing the code block. Statement 3 is executed (every time) after the code block has been executed.

Why do we use for loop?

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 do you mean by while loop?

In most computer programming languages, a while loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. The while loop can be thought of as a repeating if statement.

What are the types of loop?

It executes a block of statements number of times until the condition becomes false. Loops are of 2 types: entry-controlled and exit-controlled. ‘C’ programming provides us 1) while 2) do-while and 3) for loop. For and while loop is entry-controlled loops.

Why do we need a loop?

The purpose of loops is to repeat the same, or similar, code a number of times. This number of times could be specified to a certain number, or the number of times could be dictated by a certain condition being met.

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.

Where do we use while loop?

The while loop is used to repeat a section of code an unknown number of times until a specific condition is met. For example, say we want to know how many times a given number can be divided by 2 before it is less than or equal to 1.

How do you write a while loop?

How while loop works?The while loop evaluates the test expression inside the parenthesis () .If the test expression is true, statements inside the body of while loop are executed. … The process goes on until the test expression is evaluated to false.If the test expression is false, the loop terminates (ends).

How do you stop a while loop?

TipsThe break statement exits a for or while loop completely. To skip the rest of the instructions in the loop and begin the next iteration, use a continue statement.break is not defined outside a for or while loop. To exit a function, use return .

How does while loop work?

In most computer programming languages, a do while loop is a control flow statement that executes a block of code at least once, and then either repeatedly executes the block, or stops executing it, depending on a given boolean condition at the end of the block.

How do you write a while loop for a for loop?

4 Answers. Err, you can write any while loop as a for loop by replacing while(…) with for(;…;) … Nothing about the code you posted suggests a for loop though. Generally you’ll use a for loop when you actually want to count something, or iterate over a collection.

Can you put a while loop in a for loop?

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. If you want the loop to break based on a condition other than the number of times it runs, you should use a while loop.

What is Loop Short answer?

A loop in a computer program is an instruction that repeats until a specified condition is reached. In a loop structure, the loop asks a question. If the answer requires action, it is executed. The same question is asked again and again until no further action is required.

What is Loop explain?

In computer science, a loop is a programming structure that repeats a sequence of instructions until a specific condition is met. Programmers use loops to cycle through values, add sums of numbers, repeat functions, and many other things. Two of the most common types of loops are the while loop and the for 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.