The number primitive type is used to express numerical data. It stores this data in the double-precision 64-bit floating-point format (IEEE 754). 64 bits here refers to there being 64 binary digits available to store information. The entire 64-bit format that's used in the IEEE 754 standards can be broken down into three chunks:
- 1 bit for the sign of the number being represented: Whether the number is positive or negative
- 11 bits for the exponent of the number: This tells us where the radix or decimal dot resides
- 52 bits for what's termed the fraction or significand: This tells us the integer value
A side effect of this floating-point formation means that there are technically two zeros: positive zero (+0) and negative zero (-0
