75 lines
		
	
	
		
			1.9 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
		
		
			
		
	
	
			75 lines
		
	
	
		
			1.9 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
|   | --- | ||
|  | title: Break Control Statement | ||
|  | --- | ||
|  | # Break Control Statement
 | ||
|  | 
 | ||
|  | Terminates the loop and starts the execution of the code that immediately follows the loop. If you have nested loops, the `break` statement will only end the loop in which it is placed. | ||
|  | 
 | ||
|  | ```java | ||
|  | // Loop 1 | ||
|  | for (int i = 0; i < 10; i++) | ||
|  | {      | ||
|  |     // Loop 2 | ||
|  |     for (int j = 0; j < 10; j++) | ||
|  |     { | ||
|  |         if (i == 5 && j == 5) | ||
|  |         { | ||
|  |             break; // Will terminate Loop 2, but Loop 1 will keep going | ||
|  |         } | ||
|  |     } | ||
|  | } | ||
|  | ``` | ||
|  | 
 | ||
|  | But if you do want to break out of the outer loop too, you can use a label to exit: | ||
|  | 
 | ||
|  | ```java | ||
|  | loop1: // This is a label | ||
|  | for (int i = 0; i < 10; i++) | ||
|  | {     | ||
|  |     // Loop 2 | ||
|  |     for (int j = 0; j < 10; j++) | ||
|  |     {          | ||
|  |         if (i == 5 && j == 5) | ||
|  |         { | ||
|  |             break loop1; // Will break out of Loop 1, instead of Loop 2 | ||
|  |         } | ||
|  |     } | ||
|  | } | ||
|  | ``` | ||
|  | 
 | ||
|  |  <a href='https://repl.it/CJZA/0' target='_blank' rel='nofollow'>Run Code</a> | ||
|  | 
 | ||
|  | `break` statements can be particulary useful while searching for an element in an array. Using `break` in the following code improves efficiency as the loop stops as soon as the element we are looking for (`searchFor`) is found, instead of going on till the end of `arrayInts` is reached. | ||
|  | 
 | ||
|  | ```java | ||
|  | int j = 0; | ||
|  | int[] arrayOfInts = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; | ||
|  | int searchFor = 5; | ||
|  | 
 | ||
|  | for (int i : arrayOfInts) | ||
|  | { | ||
|  |     if (arrayOfInts[j] == searchFor) | ||
|  |     { | ||
|  |         break; | ||
|  |     } | ||
|  |     j++; | ||
|  | } | ||
|  | 
 | ||
|  | System.out.println("j = " + j); | ||
|  | ``` | ||
|  | Break statement can also be used under while statement. | ||
|  | ```java | ||
|  | int i = 0; | ||
|  | int[] arrayOfInts = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; | ||
|  | int searchFor = 5; | ||
|  | 
 | ||
|  | while(i < 10){ | ||
|  |  System.out.println("i = " + j); | ||
|  |  if(arrayOfInts[i] > 7){ | ||
|  |   break; | ||
|  |   } | ||
|  | } | ||
|  | ``` | ||
|  | 
 | ||
|  |  <a href='https://repl.it/CJZC/0' target='_blank' rel='nofollow'>Run Code</a> |