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This Ruby tutorial talks about operators, such as +, , /, *, etc.
Math Operators
Here is a list of the math operators in Ruby, and what they are in Scratch.

x + y
 Adds x and y.
 In Scratch:
((x) + (y))

x  y
 Subtracts y from x.
 In Scratch:
((x)  (y))

x * y
 Multiplies x and y.
 In Scratch:
((x) * (y))

x / y
 Divides x and y.

((x) / (y))

x ** y
 This is x to the power of y.
Operators Such as And, Or, Etc.

x > y  y > x
 Is x greater than y or y greater than x? If either of them are, x > y  y > x equals
true
. If neither of them are, returnsfalse
.  In Scratch:
<<(x) > (y)> or <(y) > (x)>>
 Is x greater than y or y greater than x? If either of them are, x > y  y > x equals