According to what I've read, all numbers in JavaScript are saved as floats except array indexes and the operands of bitwise operations. Because all floats have a sign bit <code>-0 === 0</code> should evaluate to false. However it evaluates to true.

Because JS uses the IEEE 754 standard for floating point numbers, which states that <code>-0</code> and <code>+0</code> should "compare as equal with the usual (numerical) comparison operators." (source)

Why does -0 === 0 evaluate to true? [duplicate]

1 Answers

Because JS uses the IEEE 754 standard for floating point numbers, which states that -0 and +0 should "compare as equal with the usual (numerical) comparison operators." (source)