What Does Continue Function in Java Mean
What is a continue statement in Java and how to use it?
This article will help you understand what the continue statement in Java Programming language is.
Continue Statement
The statement continue, is just the opposite of Break statement. As soon as the continue statement is executed in a loop, the control skips rest of the statements for that value and resumes for the next iteration.
Syntax
while ( condition ){ Statement 1 ; _________________ ; _________________ ; if ( another condition is true ){ continue ; } Statement 2 ; _________________ ; _________________ ; }
Given below are some examples where continue statement is used.
Example 1 − Continue Statement with Loop
public class ContinueExample1 { public static void main ( String [ ] args) { int i; for (i = 0 ; i <= 5 ; i++ ) { if ( i == 2 ) { continue ; } System .out. println (i) ; } } }
Output
0 1 3 4 5
In this code, the goal is to print from 0 to 5 without the number 2. The for loop is given so that the value of variable i is increased by 1 every loop, i.e. i = 0 in first loop, i = 1 in 2nd loop and so on. Now we want to avoid 2 from printing. For that an if statement is added which checks whether the value of variable i has reached 2 or not. After reaching, the continue statement is executed, which skips the remaining statements (here the System.out.println line) of the for loop and continues to the next loop. Now value of variable i is 3 and so the printing continues. So now the output becomes 0 1 3 4 5.
Example 2 − Continue Statement with Inner Loop
public class ContinueExample2 { public static void main ( String [ ] args) { int i,j; for (i = 0 ; i <= 5 ; i++ ) { for (j = 0 ; j <= 5 ; j++ ) { if ( i == 2 && j == 2 ) { continue ; } System .out. println (i + " " + j) ; } } } }
Output
0 1 0 2 0 3 0 4 0 5 1 0 1 2 1 3 1 4 1 5 2 0 2 1 2 3 2 4 2 5 3 0 3 1 3 2 3 4 3 5 4 0 4 1 4 2 4 3 4 5 5 0 5 1 5 2 5 3 5 4
In this code, the goal is to display the value of two for loop variables side by side excluding times when both variables are equal, i.e this code will display {1, 2}, {2, 3}, {2,4}, etc. but not print {1, 1}, {2, 2}, {3, 3}, etc. In order to achieve this, a continue statement has been added inside the inner loop. Why is it added to the inner loop, because for every single iteration of the outer loop, the inner loop iterates 6 times in this code. So if we had put the continue statement outside the inner loop, then only {5,5} would have been excluded. Now when both the for loop variables are same, like when both i and j are 2, the continue statement skips the print line and moves to the next inner loop iteration.
Example 3 − Continue Statement with Labelled For Loop
public class ContinueExample3 { public static void main ( String [ ] args) { Label1 : for ( int i = 0 ; i <= 5 ; i++ ) { Label2 : for ( int j = 0 ; j <= 5 ; j++ ) { if (i == 3 && j == 3 ) { continue Label1 ; } System .out. println (i + " " + j) ; } System .out. println ( ) ; } } }
Output
0 0 0 1 0 2 0 3 0 4 0 5 1 0 1 1 1 2 1 3 1 4 1 5 2 0 2 1 2 2 2 3 2 4 2 5 3 0 3 1 3 2 4 0 4 1 4 2 4 3 4 4 4 5 5 0 5 1 5 2 5 3 5 4 5 5
This code of a simple demonstration of what happens when there exists a huge number of nested for loops in a code, and you want to skip a particular for loop during some condition checking. For that, we add label to every for loop, i.e. naming them individually. Now if one needs to skip the statements of a particular for loop, just write continue <for loop label name>.
Example 4 − Continue Statement in While Loop
public class ContinueExample4 { public static void main ( String [ ] args) { int i = 0 ; while (i <= 10 ) { if (i == 5 ) { i++ ; continue ; } System .out. println (i) ; i++ ; } } }
Output
0 1 2 3 4 6 7 8 9 10
In this code, we are using while loop instead of for loop to skip a certain number and print the remaining numbers.
Example 5 − Continue Statement in Do-while Loop
public class ContinueExample5 { public static void main ( String [ ] args) { int i = 0 ; do { if (i == 5 ) { i++ ; continue ; } System .out. println (i) ; i++ ; } while (i <= 10 ) ; } }
Output
0 1 2 3 4 6 7 8 9 10
In this code, we are using do-while loop instead of while loop to skip a certain number and print the remaining numbers.
Updated on 05-Sep-2022 09:08:05
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Source: https://www.tutorialspoint.com/What-is-a-continue-statement-in-Java-and-how-to-use-it
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