Learning Notes

# Numbers

# JS only has floating point numbers

There is only a single type for all numbers: They are all doubles, 64-bit floating point numbers implemented according to the IEEE Standard for Floating-Point Arithmetic (IEEE 754).

Integers are simply floating point numbers without a decimal fraction:

98 === 98.0;

  
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# properties of integer literals

7.toString() // Error!

  
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There are 4 way to get around this pitfall:

(7.0)
  .toString()(7)
  .toString();
(7).toString();
(7).toString();

// "7"

  
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← push() is faster than concat() →