Add R←X+Y

Y must be numeric. X must be numeric. R is the arithmetic sum of X and Y. R is numeric. This function is also known as Plus.

Examples

      1 2 + 3 4
4 6

      1 2 + 3,⊂4 5
4  6 7

      1J1 2J2 + 3J3
4J4 5J5

      ¯5 + 4J4 5J5
¯1J4 0J5