Detailed comparison of break and continue functions

Whether it's while Cycle or for loop , There are two special statements that can be used , Namely break Statement and continue sentence
Next, I'm going to for The program example of loop introduces the function of two termination statements as a comparison

break

During the cycle , have access to break Statement jumps out of the current loop . The verification procedure is as follows ：

#include <iostream>

using namespace std;

int main()
{
    for (int i = 1; i <= 5; i++)
    {
	for (int j = 1; j <= 5; j++)
	{
	    if (j >= i)
       	    {
		cout << "*";
		break;
	    }
	}
	cout << endl;
    }
    system("pause");
    return 0;
}

         

notes ： The above two results are commented out break And uncommented break Output result of

Compare the output results ： When i = 1 also j = 1 when , Meet the conditions j >= i, Output “*”

encounter break Statement to jump out of the current for (int j = 1; j <= 5; j++) loop , Enter into for (int i = 1; i <= 5; i++) Loop execution i = 2 The cycle of

continue

break Will jump out of the current cycle , The current entire loop is no longer executed . and continue Is to end this cycle ahead of time , Continue directly to the next loop . The procedure is as follows ：

#include <iostream>

using namespace std;

int main()
{
    for (int i = 1; i <= 5; i++)
    {
	for (int j = 1; j <= 5; j++)
	{
	    if (j >= i)
	    {
		cout << "*";
		continue;
		cout << " unexecuted continue" << " ";
	    }
	}
	cout << endl;
    }
    system("pause");
    return 0;
}

     

  notes ： The above two results are commented out continue And uncommented continue Output result of

Compare the output results ： When i = 1 also j = 1 when , Meet the conditions j >= i, Output “*”

encounter continue Statement will not be executed this time j = 1 The cycle of continue Subsequent statements , It doesn't output “ unexecuted continue” sentence , Go straight back to for (int j = 1; j <= 5; j++) Loop execution j = 2 The cycle of

Summary

• break Statement can jump out of the current loop
• break Statements are usually used in conjunction with if, End the whole cycle in advance when the conditions are met
• break Statements always jump out of the nearest loop
• continue Statement can end this cycle ahead of time
• continue Statements are usually used in conjunction with if, End this cycle in advance when the conditions are met