The conditional looping statement while has the form:

while exp do

  block

end

For example, a simple loop:

> i = 3

> while i>0 do

   print(i,"\n")

    i = i-1

 end

 

3

2

1

You can exit the control of a while statement using the break keyword.  The break keyword must be the last statement in a block.

 

> a = 0

The following has to be on a single line if typed in the command window; here it’s separated for clarity:

> while true do /* infinite loop */

   print(a, ",");

   a = a+100;

   if a>500 then

      break;      //break is the last keyword inside the if statement

   end // exit the loop if the condition is true

 end            

0,100,200,300,400,500

HyperMath supports another syntax for the while statement that is akin to C-programming style. The two formats cannot be mixed.

 

while (exp) {

  block

}

So, the first example above can be reproduced as follows with this syntax:

> i = 3

> while (i>0) {

   print(i,"\n")

   i = i-1

 }

 

3

2

1