@+(value, value) ; listable

@+ is the prefix form of the infix binary operator +

@+(x, y)x + y

The functional form of the operator is useful as an argument of a high-order function as in @reduce(@+, v) which sums up all the elements of the tab v.

The addition of an int and a float returns a float.

The addition of two string corresponds to the concatenation of the arguments.

The addition of a string and any other value convert this value into its string representation before the concatenation.

See also @-, @*, @/, @%