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The Loops

The document outlines the concept of loops in computer programming, describing their functionality and various types including while loops, for loops, and do...while loops. It elaborates on each type's syntax and usage, providing examples and flowcharts for better understanding. Additionally, it discusses nested loops, showing how multiple loops can be used within each other.

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• In computer programming, a loop is a sequence of instructions that is continually repeated until a certain condition is reached. • Programming languages provide various control structures that allow for more complicated execution paths. • Loop control statements change execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.
• A loop statement allows us to execute a statement or group of statements multiple times and following is the general form of a loop statement in most of the programming languages.
DIFFERENT TYPES OF LOOP Loop Type Description While loop Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body. For loop Execute a sequence of statements multiple times and abbreviates the code that manages the loop variable. Do……While loop Like a while statement, except that it tests the condition at the end of the loop body Nested loop You can use one or more loop inside any another while, for or do..while loop.
FOR LOOP  SYNTAX :  The syntax of a for loop in C programming language is:  In computer science a for loop is a programming language statement which allows code to be repeatedly executed.
FLOWCHART
 Ex.1. A program to store 10 real nos. using for loop.
OUTPUT
SYNTAX:  The syntax of a while loop in C programming language is:  A while loop statement in C programming language repeatedly executes a target statement as long as a given condition is true.
FLOWCHART OF WHILE LOOP
 Ex.2. A PROGRAM USING WHILE LOOP.
OUTPUT
DO…..WHILE loop  Unlike for and while loops, which test the loop condition at the top of the loop, the do...while loop in C programming language checks its condition at the bottom of the loop.  A do...while loop is similar to a while loop, except that a do...while loop is guaranteed to execute at least one time.
 Ex.3. A program using DO…WHILE loop with its OUTPUT.
Nested loops The syntax for a nested for loop statement in C is as follows:
 The syntax for nested while and do….while loop: do { statement(s); do { statement(s); } while(condition); } while( condition ); while( condition ) { while( condition ) { statement(s); } statement(s); } Nested loops
 Ex.4. A program using nested for loop.
OUTPUT
KRISHMA PAREKH 2nd year C.E.