In a context not specific to R , repeat loop checks the condition at the end of each iteration while while loop checks it at the beginning of each iteration. So repeat loop executes at least one iteration while while loop may not execute any iterations if the condition is not fulfilled.
That's the difference. Repeat loop The Repeat loop executes the same code again and again until a stop condition is met. It means that in repeat loop the stop condition is present inside the loop. For Example:. In the above example the stop condition i. While loop The While loop executes the same code again and again until a stop condition is met. For example:.
In the while loop , if condition is met, then it enters the loop and execute the code. But in the repeat loop ,it repeatedly executes the code inside the block until the stop condition is met. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. If the condition is satisfied, the body of the loop is executed, then the iteration statement is executed. Then again, the condition is checked to know whether the loop will iterate further or will terminate. In Java, the initialization statement and the iteration statement may include more than one statement. The iteration variable will receive the element from the collection variable.
The type must be the same as the type of elements stored in the collection variable. The for-each form of for loop automates the iteration of the loop from starting to end accessing the values in sequential order.
There are various types of collection used with for loop. Here, the loop iterates until all the elements of the array are examined. However, the change in the iteration variable does not affect the array, as it is only a read-only variable. The while loop initially checks the condition and then executes the statements till the condition in while loop turns out to be true.
The condition in while loop can be any boolean expression. When an expression returns any non-zero value, then the condition is true, and if the expression returns a zero value, the condition becomes false. The while loop is declared as follows:. The conditions related to the while loop may be in the form of any boolean expression. The condition is true if a non-zero value is returned and becomes false in case zero is returned. The loop repeats itself in case the condition becomes true.
In case the condition becomes false , then the next line of the code, which is immediately after the iteration command, gets executed. In the while loop, the body loop or statements may either be in the form of a block of statements, a clear statement, or just a single statement. The for loop is best used for loops wherein initialization and increment form single statements and tend to be logically related.
Use this when you know the number of times the loop will run. It is also a good choice when obtaining user input and reading the contents of a file into a variable. Register Login. PPO Diploma vs.
Let us start with a brief introduction to loops in programming. What are the loops? For loop vs. While loop The following comparison chart depicts the difference between for and while loops: Basis of Difference For Loop While Loop Format In the for loop, the initialization , checking of the condition, and the iteration statement are all written atop the loop. In the case of the while loop, only initialization and checking of the condition is carried out atop the loop.
The same question is repeated until the new statement is applied. The result in the looping process executes continually until the program reaches a breakpoint. If the breaking point is not reached, it will lead to the crashing of the program. Both the for loop and the while loop are conditional statements.
For loop is a single lined command to be executed repeatedly and While loop may be a single-lined command or may contain various commands for a single condition.
For loop and while loop both play an important role in computer languages to get results. If the command syntax is correct the condition is reached. What is For loop? What is While loop? Main Differences Between For loop and While loop BIn for loop, the number of iterations to be conducted is already known whereas in while loop the number of iterations are not known.
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