+ — plus operator

1. Definition

Plus is basic operator of addition — the result of addition of two numbers is total quantity of both numbers.

Symmetry:

a + b = b + a

Zero item:

a + 0 = a

Negative item:

a + (−b) = a − b

Associativity:

a + b + c = a + (c + b)

To add numbers:

7+2

To add complex numbers:

7+i*4+2+i;

To engage current result as item:

rslt+2;

To engage number z in memory as item:

mem[z]+2;

To add numbers z and w in memory:

mem[z]+mem[w];

Addition of complex numbers is supported in professional version of the Librow calculator.