3.6.5. Floating-point literals

Floating-point literals can take any of the following forms:

{-}digits??E{-}digits

{-}{digits}.digits{E{-}digits}

0xhexdigits

&hexdigits

where:

digits

Are sequences of characters using only the digits 0 to 9. You can write E in uppercase or lowercase. These forms correspond to normal floating-point notation.

hexdigits

Are sequences of characters using only the digits 0 to 9 and the letters A to F or a to f. These forms correspond to the internal representation of the numbers in the computer. Use these forms to enter infinities and NaNs, or if you want to be sure of the exact bit patterns you are using.

The range for single-precision floating-point values is:

The range for double-precision floating-point values is:

Examples

    DCFD    1E308,-4E-100
    DCFS    1.0
    DCFD    3.725e15
    LDFS    0x7FC00000              ; Quiet NaN
    LDFD    &FFF0000000000000       ; Minus infinity
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