# What is a Unit?

A unit is a standard measurement whose multiples are used in determining quantity, e.g. an inch, degree, calorie, volt, or hour. (Dictionary object)

# Units in Small Basic

There are some different units used in Small Basic objects:

- Pixel - graphics dot unit
- Column - text horizontal character unit
- Row - text vertical character unit
- Year - 365 or 366 days
- Month - 28~31 days
- Day - 24 hours
- Hour - 60 minutes
- Minute - 60 seconds
- Second - 1000 milliseconds
- Millisecond - 1/1000 of a second
- Degree - angle unit (360 degree = 1 round)
- Radian - angle unit (2π radian = 1 round)

And the following units don't have their names of units:

- Turtle Speed - 1~10
- Opacity - 0~100
- Color Value - 0~255

# See Also

- Small Basic: Pixel (TechNet Wiki)

Math.Pi

is a unit ?

Yvan,

Pi as a unit? Yes, I think that makes sense.

pi is a dimensionless number (just like 23.8) and has no unit - it is the ratio of circumference to diameter of a circle.

In some circumstances you could argue pi is an angle with units of radian (pi radians = 180 degrees), but I think that would be 'unusual' and certainly pi is not a unit itself.

Hi Ed and Nonki !

finally , regarding this debate, i found this beautiful website:

http://www.numericana.com/answer/constants.htm#g

and Pi , 0, 1, e. are math constant but part of computers language, so what they are ? in a computer point of view ?

Pi was used in my old Zx-81 computer in the 80's as a special key on the keyboard, !