Out parameters

Functions

With a return value
Without a return value
Multiple return values
Without parameters
Array of parameters
Out parameters
In-out parameters
Modifying parameters
Optional parameter values
External parameter names
Recursion

def get_sum!(sum, n1, n2)
sum[0] = n1 + n2
end

sum = [0]
get_sum!(sum, 5, 3)
# sum is [8]

puts "sum is #{sum}"

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