Intel® Fortran Compiler 16.0 User and Reference Guide
Inquiry Intrinsic Function (Generic): Returns the length (in bits) of the two's complement representation of an integer.
result = ILEN (i)
i |
Must be of type integer. |
The result type and kind is the same as i. The result value is (LOG2( i+ 1 )) if i is not negative; otherwise, the result value is (LOG2( - i)).
ILEN (4) has the value 3.
ILEN (-4) has the value 2.