CA IDMS Reference 19.0

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LOGARITHM Function

Returns the common (base 10) or natural (base E) logarithm of a numeric value.
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Returns the common (base 10) or natural (base E) logarithm of a numeric value.
Syntax
Logarithm (base 10)
 

 
►►─┬─ LOG-BASE-10 ─┬─ ( 
value
 ) ──────────────────────────────────────────────►◄
   ├─ COMLOG ──────┤
   ├─ LOGCOM ──────┤
   └─ LOG10 ───────┘
 
Logarithm (base E)
 

 
►►─┬─ LOG-BASE-E ─┬─ ( 
value
 ) ───────────────────────────────────────────────►◄
   ├─ NATLOG ─────┤
   ├─ LOGNAT ─────┤
   └─ LOGE ───────┘
 
Parameters
  • value
    Specifies the numeric value whose logarithm is calculated.
    Value
     can be:
    • An arithmetic expression
    • The name of a user-defined variable data field
    • A user-supplied numeric literal
    Value
     must be greater than zero.
Example
In the following example, the logarithm function is used to calculate the base-10 logarithm of a numeric value:

Initial value:
    WK-VALUE:  100
Statement:
    MOVE LOG-BASE-10(WK-VALUE) TO WK-LOG-EQUIVALENT.
Returned value:  2