Intel® Fortran Compiler 17.0 Developer Guide and Reference

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.

Parent topic: Real Data Types

See Also

General Rules for Real Constants

Compiler Reference > Data and I/O section: Data Representation