Intrinsic procedures

Most of the intrinsic functions have already been mentioned. Here, we deal only with their general classification and with those that have so far been omitted. All intrinsic procedures can be used with keyword arguments:

call date_and_time(TIME=t)

and many have optional arguments.

The intrinsic procedures are grouped into four categories:

1. elemental - work on scalars or arrays, e.g. abs(a);

2. inquiry - independent of value of argument (which may be undefined), e.g. precision(a);

3. transformational - array argument with array result of different shape, e.g. reshape(a, b);

4. subroutines, e.g. system_clock.

The procedures not already introduced are

Bit inquiry

bit_size

Number of bits in the model

Bit manipulation

btest	Bit testing
iand	Logical AND
ibclr	Clear bit
ibits	Bit extraction
ibset	Set bit
ieor	Exclusive OR
ior	Inclusive OR
ishft	Logical shift
ishftc	Circular shift
not	Logical complement

Transfer function, as in

integer :: i = transfer('abcd', 0)

(replaces part of equivalence)

Subroutines

date_and_time	Obtain date and/or time
mvbits	Copies bits
random_number	Returns pseudorandom numbers
random_seed	Access to seed
system_clock	Access to system clock
cpu_time	Returns processor time in seconds