RoundSigFigs

Function

RoundSigFigs(value)

value

RoundSigFigs(value, figures)

value
figures

RoundSigFigs is included by default in each file as part of the Math library.

 

See also:

Use

The RoundSigFigs() function returns a number rounded to have the number signigicant figures specified. It will round the number up or down appropriately.

The number result given by RoundSigFigs() is a new number stored at that value, as opposed to rounding with value formatting, which only changes how a number is displayed.

RoundSigFigs() treats rounding up as rounding away from 0. For example, RoundSigFigs(-7.9, 1)  = -8 and RoundSigFigs(-7.2, 1)  = -7.

Units

Numbers with units will be rounded based on those units. This means that the unit a number has at the point of calculation will affect the answer.

For example, RoundSigFigs(5.8ft, 1) and RoundSigFigs(5.8 ft to mm, 1) will return values that are not equal.

Examples
  • RoundSigFigs(23847, 1)  = 20000
  • RoundSigFigs(23847, 3)  = 23800
  • RoundSigFigs(.0002384, 2)  = 0.00024
  • RoundSigFigs(.0002384, 3)  = 0.000238
  • RoundSigFigs(1.8, 1)  = 2
  • RoundSigFigs(1.2, 1)  = 1
  • RoundSigFigs(-1.8, 1)  = -2
  • RoundSigFigs(12.8888, 3)  = 12.9
  • RoundSigFigs(12.8888, 5)  = 12.889
  • RoundSigFigs(45183.1, 3)  = 45200
  • RoundSigFigs(3.2 ft, 1)  = 3ft
  • RoundSigFigs(3.2 ft to cm, 1)  = 98cm
  • RoundSigFigs(3.2 ft to cm, 1) to ft  = 3.215 ft
Related functions