Usually the condition changes during the execution of the statement so next time while checking the condition we may get a False output. Condition is a boolean expression which evaluates to either true or false. Let us write a C program to print natural numbers from 1 to 10 using while loop. do while loop in C programming Using do while loop we will execute the statement first and then check the condition. The while loop . The for loop While Loop in C. A while loop is the most straightforward looping structure. While loop in C programming Loop executed 1 time Loop executed 2 time Loop executed 3 time Loop executed 4 time Control came out from while loop. Read more about C While Loop. C While Loop. Example program to demonstrate while loop. 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". This is the basic difference between while loop and do while loop. Syntax of while loop in C programming language is as follows: The variable n initialized with value 1, and then printf statement executed and displayed the message “While loop in C programming” to the screen. In this tutorial, we will learn the syntax of while loop, its execution flow using flow diagram, and its usage using example programs. C Do-While Loop. The "While" Loop . C While loop statement lets programmers to execute a block of statements repeatedly in a loop based on a condition. while loop in c language i.e syntax, flow chart and simple example program 3. The Loop Control Structure in C programming. Loops in C/C++ come into use when we need to repeatedly execute a block of statements.. During the study of ‘for’ loop in C or C++, we have seen that the number of iterations is known beforehand, i.e. Here the C statements can be executed only if condition is True or satisfied. The general form of for statement is as under: The only difference is that in do-while loop, the test condition is evaluated at the end of loop. The do-while loop is similar to while loop. the number of times the loop body is needed to be executed is known to us.The while loop in C/C++ is used in situations where we do not know the exact number of iterations of loop … These are three methods by way of which we can repeat a part of a program. Write a program in C to multiply two numbers without actually using the * operator but have to use both the while and do-while loops. While loop is very useful, when the number of times the statements in the loop has to be executed is not known in advance. The do-while loop . The simplest of three loops in C Language is the C while loop.In common language while has fairly obvious meaning: the while-loop has a condition:. The specified condition determines whether to execute the loop body or not. A "While" Loop is used to repeat a specific block of code an unknown number of times, until a condition is met. while loop in C programming Using while loop we will check the condition first and then execute the statement. 2. They are: Using a for Loop; Using a while Loop; Using a do-while Loop; C for Loop. Now, while loop execution started. while (condition) { statements; } If the statements are executed while the condition has the value “true” (1).The first important thing about this while loop is that has a conditional expression (something like (a > b) etc… The while loop in C Programming is to repeat a block of statements for a given number of times until the given condition is False. While loop in C starts with the condition, if the condition is True, then statements inside the while loop will be executed. Program using the while loop 4.1. Here the C statements can be executed once even if condition is not satisfied. 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