We know there are generally many looping conditions like for, while, and do-while. The C while loop is used when you want to execute a block of code repeatedly with a checked condition before making an iteration. The syntax of a while loop in C programming language is − while(condition) { statement(s); } Here, statement(s) may be a single statement or a block of statements. Learn C Loops: While and Do-While 1. Second, it asks the user to enter a number and matches it with the secret number. If the condition evaluates to true, the code inside the while loop is executed. It can be any combination of boolean statements that are legal. Developed by JavaTpoint. The C++ do-while loop is used to iterate a part of the program several times. It is necessary to update the loop condition inside the loop body to avoid an indefinite loop. The Do While loop in C Programming will test the given condition at the end of the loop. If the condition is true then once again statements in the body are executed. A while loop has no built-in loop control variable as there is with the for loop; instead, an expression needs to be specified similar to a test expression specified in a for loop. The do-while loop is an exit-condition loop. While both the entry control loops are quite similar and they serve basically the same purpose, the anatomy of a for loop is slightly different than a while loop. As usual, if the body of do while loop contains only one statement, then braces ({}) can be omitted. The while loop in C/C++ is used in situations where we do not know the exact number of iterations of loop beforehand. JavaTpoint offers too many high quality services. There are 3 loops in C++, for, while, do-while. The while loop in C/C++ is used in situations where we do not know the exact number of iterations of loop beforehand. This process continues until the condition is false. A "While" Loop is used to repeat a specific block of code an unknown number of times, until a condition is met. The loop iterates while the condition is true. It can be any combination of boolean statements that are legal. Note: Do not forget to increase the variable used in the condition, otherwise the loop will never end! This means that the body of the loop is always executed first. If you use a do-while loop inside another do-while loop, it is known as nested do-while loop. C – while loop Syntax of while loop: while (condition test) { //Statements to be executed repeatedly // Increment (++) or Decrement (--) Operation } The condition in while loop can be any boolean expression. The basic structure is. While loop in C starts with the condition, if the condition is True, then statements inside the while loop will be executed. The while statement provides an iterative loop. The C language while loop is a lot easier to look at than a for loop, but it involves more careful setup and preparation. If the test condition is TRUE, the program executes the body of the loop again. Basics. do while loop. In do while loop first the statements in the body are executed then the condition is checked. The loop execution is terminated on the basis of the test condition. #include
using namespace std; int main() { int i=1; /* The loop would continue to print * the value of i until the given condition * i<=6 returns false. */ while(i<=6) { cout<<"Value of variable i is: "<
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