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8.11.9.170 Log Intrinsic

     Log(X)

Log: REAL or COMPLEX function, the exact type being that of argument X.

X: REAL or COMPLEX; scalar; INTENT(IN).

Intrinsic groups: (standard FORTRAN 77).

Description:

Returns the natural logarithm of X, which must be greater than zero or, if type COMPLEX, must not be zero.

See Exp Intrinsic, for the inverse of this function.

See Log10 Intrinsic, for the `common' (base-10) logarithm function.