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What is the difference between break with a label and without a label in JavaScript?
Break without label
The break statement is used to exit a loop early, breaking out of the enclosing curly braces. The break statement exits out of a loop.
Example
Let’s see an example of break statement in JavaScript without using label −
<html> <body> <script> var x = 1; document.write("Entering the loop<br /> "); while (x < 20) { if (x == 5){ break; // breaks out of loop completely } x = x + 1; document.write( x + "<br />"); } document.write("Exiting the loop!<br /> "); </script> </body> </html> Break with label
Labels are used to control the flow of a program i.e. let’s say using it in a nested for loop to jump to inner or outer loop. You can try to run the following code to use labels to control the flow, with break statement −
Example
<html> <body> <script> document.write("Entering the loop!<br /> "); outerloop: // This is the label name for (var i = 0; i < 5; i++) { document.write("Outerloop: " + i + "<br />"); innerloop: for (var j = 0; j < 5; j++) { if (j > 3 ) break ; // Quit the innermost loop if (i == 2) break innerloop; // Do the same thing if (i == 4) break outerloop; // Quit the outer loop document.write("Innerloop: " + j + " <br />"); } } document.write("Exiting the loop!<br /> "); </script> </body> </html>
Updated on: 2020-06-12T14:05:42+05:30
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