Plus Sign
The plus sign is a binary operator that indicates addition, as in 2 + 3 = 5. It can also serve as a unary operator that leaves its operand unchanged (+x means the same as x). This notation may be used when it is desired to emphasise the positiveness of a number, especially when contrasting with the negative (+5 versus −5).
The plus sign can also indicate many other operations, depending on the mathematical system under consideration. Many algebraic structures have some operation which is called, or equivalent to, addition. Moreover, the symbolism has been extended to very different operations. Plus can mean:
- exclusive or (usually written ⊕): 1 + 1 = 0, 1 + 0 = 1
- logical disjunction (usually written ∨): 1 + 1 = 1, 1 + 0 = 1
Read more about this topic: Plus And Minus Signs
Famous quotes containing the word sign:
“Having resumed our seats in the canoe, I felt the Indian wiping my back, which he had accidently spat upon. He said it was a sign that I was going to be married.”
—Henry David Thoreau (1817–1862)
“We “need” cancer because, by the very fact of its incurability, it makes all other diseases, however virulent, not cancer.”
—Gilbert Adair, British author, critic. “Under the Sign of Cancer,” Myths and Memories (1986)