- C++ Data Structures
- C++ Basic Input/Output
- C++ Date & Time
- C++ References
- C++ Pointers
- C++ Strings
- C++ Arrays
- C++ Numbers
- C++ Functions
- C++ Decision Making
- C++ Loop Types
- C++ Operators
- C++ Storage Classes
- C++ Modifier Types
- C++ Constants/Literals
- C++ Variable Scope
- C++ Variable Types
- C++ Data Types
- C++ Comments
- C++ Basic Syntax
- C++ Environment Setup
- C++ Overview
- C++ Home
C++ Object Oriented
- C++ Interfaces
- C++ Encapsulation
- C++ Abstraction
- C++ Polymorphism
- C++ Overloading
- C++ Inheritance
- C++ Classes & Objects
C++ Advanced
- C++ Web Programming
- C++ Multithreading
- C++ Signal Handling
- C++ Preprocessor
- C++ Templates
- C++ Namespaces
- C++ Dynamic Memory
- C++ Exception Handling
- C++ Files and Streams
C++ Useful Resources
- C++ Discussion
- C++ Useful Resources
- C++ Standard Library
- C++ STL Tutorial
- C++ Object Oriented
- C++ Quick Guide
- C++ Questions and Answers
Selected Reading
- Who is Who
- Computer Glossary
- HR Interview Questions
- Effective Resume Writing
- Questions and Answers
- UPSC IAS Exams Notes
C++ Loop Types
There may be a situation, when you need to execute a block of code several number of times. In general, statements are executed sequentially: The first statement in a function is executed first, followed by the second, and so on.
Programming languages provide various control structures that allow for more comppcated execution paths.
A loop statement allows us to execute a statement or group of statements multiple times and following is the general from of a loop statement in most of the programming languages −
![Loop Architecture](/cplusplus/images/loop_architecture.jpg)
C++ programming language provides the following type of loops to handle looping requirements.
Sr.No | Loop Type & Description |
---|---|
1 | Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body. |
2 | Execute a sequence of statements multiple times and abbreviates the code that manages the loop variable. |
3 | Like a ‘while’ statement, except that it tests the condition at the end of the loop body. |
4 | You can use one or more loop inside any another ‘while’, ‘for’ or ‘do..while’ loop. |
Loop Control Statements
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.
C++ supports the following control statements.
Sr.No | Control Statement & Description |
---|---|
1 | Terminates the loop or switch statement and transfers execution to the statement immediately following the loop or switch. |
2 | Causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating. |
3 | Transfers control to the labeled statement. Though it is not advised to use goto statement in your program. |
The Infinite Loop
A loop becomes infinite loop if a condition never becomes false. The for loop is traditionally used for this purpose. Since none of the three expressions that form the ‘for’ loop are required, you can make an endless loop by leaving the conditional expression empty.
#include <iostream> using namespace std; int main () { for( ; ; ) { printf("This loop will run forever. "); } return 0; }
When the conditional expression is absent, it is assumed to be true. You may have an initiapzation and increment expression, but C++ programmers more commonly use the ‘for (;;)’ construct to signify an infinite loop.
NOTE − You can terminate an infinite loop by pressing Ctrl + C keys.
Advertisements