Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 7/13/2023
Public

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REAL(16) Constants

A REAL(16) constant has more than four times the accuracy of a REAL(4) number, and a greater range.

A REAL(16) constant occupies 16 bytes of memory. The number of digits that precede the exponent is unlimited, but typically only the leftmost 33 digits are significant.

IEEE* binary128 format is used.

Examples

Valid REAL(16) Constants

123456789Q4000

-1.23Q-400

+2.72Q0

1.88_16

Invalid REAL(16) Constants

1.Q5000

Too large.

1.Q-5000

Too small.

See Also