C++ language

A Loop is a block of code for repeating a statement one and more times Until Some Way of ending the loop Occur. Repetition is depend on the loop condition. when you need to execute a block of code or repeat a statement continuously Until a known Or Unknown Condition , for known number of repetition we use of for loop and for unknown we use of while or do while loop.

Typically in a for loop, repeated as long as an expression is true (a while loop) or repeated until an expression becomes false in a do while loop.

Type of loops In C++:-

1. For Loop
2. While Loop
3. Do while loop
4. Nested loop

1. 1. For loop:- For loop in c++ is used to repeat statement continuously for a specific number of time.
Examples-

#include<iostream>
using namespace std;
int main()
int i;
for (i = 0; i < 20; i++)
{
cout << "Hello" << "\n";
cout << "There" << "\n";
}
return 0;
}

2. While Loop- In While loop repeat statement until a certain condition is met. That Means we use While if you don’t know how many times a loop must run.
Examples:-

#include<iostream>
using namespace std;
{
int i=0;
while (i < 4)
 {
cout << i++;

  }
}

3. Do- while Loop:-Do while is basically similar to while loop. The do-while loop is usually preferred over a while-loop when the statement needs to be executed at least once.
Example:-

#include <iostream>
using namespace std;
int main()
{
int x;
x = 2;
do {
cout<<"Hello, world!\n";
} while ( x != 2 );
cin.get();
}

4. Nested Loop:- Nested loop means Place loop inside another loop it is called nesting of loops, So use of one loop in another loop is nested loop.
Example:-

#include <stdio.h>
#include <conio.h>
void main ()
{
int= i, j;
clrscr ();
for (j=1; j<=4; j++)    
{
for (i=1; i<=5; i++)   // Nesting of loop
{
	printf (*);
}
printf ("/n");
}
}

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