Double data type
Double (double-precision floating-point) variables are stored as IEEE 64-bit (8-byte) floating-point numbers ranging in value from:
-1.79769313486231E308 to -4.94065645841247E-324 for negative values
4.94065645841247E-324 to 1.79769313486232E308 for positive values
The type-declaration character for Double is the number (#) sign.
See also
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