While

while( condition ) loop

•	condition	–	If this executes as true then loop is executed.
•	loop	–	Can be either a single statement, a block statement, or a null statement.

Any of the statements can be null statements.

**Conditional Types**
Type	Condition
integer	True if it is not zero.
float	True if it is not zero.
string	True if its length is not zero.
key	True only if it is a valid key and not NULL_KEY.
vector	True if the vector is not ZERO_VECTOR.
rotation	True if the rotation is not ZERO_ROTATION.
list	True if the length is not zero.

//single statement
integer a = 0;
integer b = 10;
while(a < b)
    llOwnerSay((string)(a++));

//block statement
integer a = 0;
integer b = 10;
while(a < b)
{
    llOwnerSay((string)a);
    ++a;
}

//null statement
integer a = 0;
integer b = 10;
while(a++ < b);

A do-while loop is faster than a while loop or a for loop in LSO.