#include 
    
     using namespace std; int main () { for( ; ; ) { printf("This loop will run forever.\n"); } return 0; } 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 − 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 loops

You can use one or more loop inside any another ‘while’, ‘for’ or ‘do..while’ loop.

https://www.tutorialspoint.com/cplusplus/cpp_loop_types.htm