Numbers in Ruby has a lot of advantages over the built-in classes. It's easier and more intuitive to use, it handles decimal numbers correctly and it has better rounding behaviour.
The + is an inbuilt method in Ruby returns the addition of two numbers. It returns a + b. Parameters: The function needs two number whose addition is returned. Return Value: It returns the addition of two numbers.
To sum an array of numbers in Ruby, use Array#sum.
To sum an array of numbers in Ruby, use Array#inject.
To sum an array of numbers in Ruby, use Array#each.
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