while

Syntax

while(condition, body)
while(condition, limit, body)

Loop while a condition holds.

while() evaluates an expression repeatedly while its condition evaluates to true. The expression receives a bound variable _ indicating the current iteration number.

Returns the result of the last iteration or null.

i = 0;
while(i < 5,
    print(_);
    i += 1;
);

while() may also be called with three arguments. Where the second argument specifies an upper limit for the number of times to loop.

i = 0;
while(i < 7, 5, // can only loop 5 times
    print(_);
    i += 1;
);