Intel® Fortran Compiler 16.0 User and Reference Guide
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 X_floating format is used.
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123456789Q4000 |
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-1.23Q-400 |
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+2.72Q0 |
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1.88_16 |
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1.Q5000 |
Too large. |
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1.Q-5000 |
Too small. |
Compiler Reference ... Data and I/O section: Data Representation