_PI - QB64Official/qb64 GitHub Wiki

The _PI function returns � as a _FLOAT value with an optional multiplier parameter.

Syntax

circumference = _PI[(multiplier)]

Parameter(s)

  • Optional multiplier (2 * radius in above syntax) allows multiplication of the π value.

Description

  • Function can be used in to supply π or multiples in a program.
  • Accuracy is determined by the return variable type AS SINGLE, DOUBLE or _FLOAT.
  • The � value can also be derived using 4 * ATN(1) for a SINGLE value.

Example(s)

Calculating the area of a circle using a SINGLE variable in this case.


radius = 5
circlearea = _PI(radius ^ 2)
PRINT circlearea



 78.53982

See Also