Loops in C++ : What is loop and types of loop in C++?

 Loops

In computer programming, loops are used to  repeat a block of code . For example, let's say we want to show a message 1000times , Then instead of writing the print statement 1000 times, we can use a loop.

Type of loops

1. For loop

2. While loop

3. Do while loop

For loop 

For loop uses an external variable to control the execution. A for loop takes into account the

                                         

Initialization

Condition checking

Incrementation

In its syntax itself. The syntax is shown below:-

For(initialization;condition;incrememt){

//body

}

While loop 

Imagine we had to print “Hello World” 100 times or n-number of times. Would it be wise to write cout << “Hello World\n” 100 times. While loops help us automate this.

Sometimes, the loop also uses an external initialization and incrementation logic to control how many times the loop may run

In its syntax itself. The syntax is shown below:

initialization; 

While (condition) { 

//body

}

Do while loop 

Do While Loop

Do while is very similar to while loop with one difference that it is exit control loop.

That is the decision to run the loop again or not happens at the time of exit of the current loop.

While in the while loop it happens before entry in the loop.

Sometimes, the loop also uses an external initialization and incrementation logic to control how many times the loop may run

Do{ 

//body

 }while (condition); 

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