Operators

Comparison Operators

|Operator|Description |---|---|---|---|---|---|---|---|---|--- |==|true if the two values are equal. |!=|true if the two values are not equal. |<|true if the value of the operand on the left is less than the value on the right. |>|true if the value of the operand on the left is greater than the value on the right. |>=|true if the value of the operand on the left is greater than or equal to the value on the right. |<=|true if the value of the operand on the left is less than or equal to the value on the right. |<=>|0 if the value of the operand on the left is equal to the value on the right,
1 if the value of the operand on the left is greater than the value on the right,
-1 if the value of the operand on the left is less than the value on the right.

Assignment Operators

Simple Assignment

= is a simple assignment. It creates a new local variable if the variable was not previously referenced.

x is 3, y is 9

Parallel Assignment

Variables can also be assigned in parallel, e.g. x, y = 3, 9. This is especially useful for swapping values:

x is 9, y is 3

Abbreviated Assignment

It’s possible to mix operators and assignment. For example:

x is 1, y is 2
x is now 3

Various operations can be used in abbreviated assignment:

|Operator|Description|Example|Equivalent to |---|---|---|---|---|---|---|---|---|--- |+=|Adds and reassigns the variable|x += y|x = x + y |-=|Subtracts and reassigns the variable|x -= y|x = x - y |*=|Multiplies and reassigns the variable|x *= y|x = x * y |/=|Divides and reassigns the variable|x /= y|x = x / y |%=|Divides, takes the remainder, and reassigns the variable|x %= y|x = x % y |**=|Calculates the exponent and reassigns the variable|x **= y|x = x ** y