Name

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FIRST_DIGIT

Purpose

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This function returns the first significant digit.

Category

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Mathematics

Calling Sequence

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Result = FIRST_DIGIT( Indata )

Inputs

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Indata: A scalar or array of type floating point.

Outputs

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Result: Returns the value of the first significant digit(s)
of Indata.

Procedure

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This function searches recursively until it finds the first
signficant digit.

Example

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Determine the first significant digit of 0.0345.
result = first_digit( 0.0345 )

Modification History

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  Written by: Daithi A. Stone, 2000-06-20.
Modified: DAS, 2000-07-06 (removed LENGTH.pro).
Modified: DAS, 2000-09-25 (removed zero bug).
Modified: DAS, 2001-01-11 (fixed rounding bug).