== and != Operators

== compares two values, and returns True if they are equal.

1 + 1 == 2 //-> True
1 == 2 //-> False

Compound values are compared by their elements.

[1, 2] == [1, 1 + 1] //-> True

!= compares whether two values are not equal.

1 != 2 //-> True

Float values are compared by value, including positive and negative zero.

1.5 == 1.5 //-> True
0.0 == -0.0 //-> True

Floats have limited precision, so arithmetic can produce results that are close but not exactly equal. Comparing computed floats with == is usually a mistake.

0.1 +. 0.2 == 0.3 //-> False