View source for Tutorial:BeanShell/7 Loops


__NOCACHE__

Java has very flexible three looping mechanisms. You can use one of the following three loops:

*     while Loop
*     do...while Loop
*     for Loop

== The "while" loop ==

One other point is that the code to be executed if the conditions are met. That means that if you want to loop the next five lines with a 'while' loop, you must put a set number of spaces at the beginning of each of the next five lines.

<jc lang="bsh">
x=0;
while( x < 20 ){
         print("value of x : " + x );
         x++;
      }
</jc>

== The "for" loop ==

The loop based on "for" is also very popular. Let  us print values from 0 to 10 in a for loop:

<jc lang="bsh">
x=10;
for(x = 10; x < 20; x++){
         print("value of x : " + x );
      }
</jc>

One can also break this loop if a condition is met:

<jc lang="bsh">
x=0;
for(x=10; x < 20; x++){
         if (x==13) break; '' break the loop here
         print("value of x : " + x );
      }
</jc>

You can also use the continue statement if you want to skip some iteration, without exiting the loop:

<jc lang="bsh">
x=10;
for(x = 10; x < 20; x++){
         if (x==13) continue; '' do not print x=13
         print("value of x : " + x );
      }
</jc>