LOG - Logarithm

The LOG function returns a numeric value that approximates the logarithm to the base e (natural log) of argument-1.
The type of this function is numeric.

Format

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FUNCTION LOG (argument-1)

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Arguments

1. argument-1 must be class "numeric".

2. The value of argument-1 must be greater than zero.

Returned values

1. The returned value is the approximation of the logarithm to the base e of argument-1.

2. The error default value is - 9’999’999’999’999’999’999’999’999’999’999.

See also:        LOG10, FACTORIAL, SQRT

Example 9-21

...
DATA DIVISION.
WORKING-STORAGE SECTION.
01  L PIC S99V999 VALUE 3.
01  R PIC S99V999999.
01  RES PIC 99.999999.
PROCEDURE DIVISION.
P1 SECTION.
MAIN.
    COMPUTE R = FUNCTION LOG (L).
    MOVE R TO RES.
    DISPLAY RES UPON T.
    STOP RUN. 

Result:               01.098612