Joy (programming language) – Wikipedia

))) This is different in many ways, but it still uses the formal parameter x in the same way. In Joy the square function is defined: DEFINE square == dup * . In Joy, everything is a function that takes a stack as an argument and returns a stack as a result. For instance, the numeral ‘5’ does not represent an integer constant, but instead a short program that pushes the number 5 onto the stack. The dup operator simply duplicates the top element of the stack by pushing a copy of it. The *…

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