I. Introduction

1.break statement: loop - loop interrupts and stops to exit the current loop;

Flow chart:

2.continue: loop - the next iteration of the loop continues.

Flow chart:

Execution process: immediately result this cycle and judge the cycle conditions. If it is true, enter the next cycle, otherwise exit this cycle.

For example: when I write the code, I go to the toilet and come back to continue to write the code.

 

Two. Example

Exercise 1: output "hello world"

First: continue

         while (true)
            {
                Console.WriteLine("Hello World");
                continue;            
            }
            Console.ReadKey();

Output result

 

Second: break

       while (true)
            {
                Console.WriteLine("Hello World");
               continue;
            }

Output result

 

 

Exercise 2: use while continue to calculate the sum of all integers between 1 and 100 (inclusive), except that they can be divided by 7 integers.

           int sum = 0;
            int i = 1;
            while (i<=100)
            {
                if (i%7==0)
                {
                    i++;
                    continue;                 
                }
                sum += i;
                i++;
            }
            Console.WriteLine(sum);
            Console.ReadKey();

Output results

 

 

Exercise 3: find all prime numbers in 100

          //Find all prime numbers in 100
            //Prime / Prime: a number that can only be divided by 1 and the number itself
            //2 3  4  5  6  7
            //7   7%1   7%2 7%3 7%4 7%5 7%6  7%7  6%2
           
            for (int i = 2; i <= 100; i++)
            {
                bool b = true;
                for (int j = 2; j <i; j++)
                {
                    //Apart from the fact that it's not a prime number, there's no need to continue to extract the remainder.
                    if (i % j == 0)
                    {
                        b = false;
                        break;
                    }
                }

                if (b)
                {
                    Console.WriteLine(i);
                }
            }

            Console.ReadKey();
            //6   6%2 6%3

Output results