plus

plus( 
n_op1 
n_op2 
[ n_op3 ... ] 
) 
=> n_result

Returns the result of adding one or more operands to the first operand. Prefix form of the + arithmetic operator.

n_op1	First number to be added.
n_op2	Second number to be added.
n_op3	Optional additional numbers to be added.

n_result

Sum of the numbers.

plus(5 4 3 2 1) 
=> 15

plus(-12 -13)   
=> -25

plus(12.2 13.3) 
=> 25.5