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REAL

 Real and complex numbers are floating-point representations.

 The exponent for REAL(KIND=4) (or REAL*4) (F_floating) and DOUBLE
 PRECISION (REAL(KIND=8) or REAL*8) (D_floating) formats is stored
 in binary excess 128 notation.  Binary exponents from -127 to 127
 are represented by the binary equivalents of 1 through 255.

 The exponent for the DOUBLE PRECISION G_floating format and
 T_floating format is stored in binary excess 1024 notation.  The
 exponent for the REAL*16 format is stored in binary excess 16384
 notation.  In DOUBLE PRECISION (G_floating) format, binary exponents
 from -1023 to 1023 are represented by the binary equivalents of 1
 through 2047.  In REAL*16 format, binary exponents from -16383 to
 16383 are represented by the binary equivalents of 1 through 32767.

 For floating-point format, fractions are represented in
 sign-magnitude notation, with the binary radix point to the left of
 the most significant bit for F_floating, D_floating, and G_floating,
 and to the right of the most significant bit for S_floating and
 T_floating.  Fractions are assumed to be normalized, and therefore
 the most significant bit is not stored.  This bit is assumed to be 1
 unless the exponent is 0.  in which case the value represented is
 either zero or is a reserved operand.

 REAL(KIND=4) (or REAL*4) numbers occupy four contiguous bytes and
 the precision is approximately one part in 2**23, that is,
 typically 7 decimal digits.

 DOUBLE PRECISION (D_floating) numbers occupy eight contiguous bytes
 and the precision is approximately one part in 2**55, that is,
 typically 16 decimal digits.

 DOUBLE PRECISION G_floating numbers occupy eight contiguous bytes
 and the precision is approximately one part in 2**52, that is,
 typically 15 decimal digits.

 REAL*16 (H_floating) numbers occupy sixteen contiguous bytes and
 the precision is approximately 2**112, that is, typically 33
 decimal digits.

 For more information on real data type ranges, see DATA CONSTANTS
 REAL and DATA CONSTANTS DOUBLE_PRECISION in this Help file.