Adder notation: “The carry-out of a binary adder is denoted by the summation symbol (Σ).” Evaluate this statement.

Introduction / Context:
In adder schematics and block diagrams, the symbol Σ commonly labels the sum function/output, not the carry. Carry signals are typically labeled Cin and Cout (or Cn and Cn+1) explicitly.

Given Data / Assumptions:

• Standard adder notation: Σ for sum, C for carry.
• The claim conflates these roles.

Concept / Approach:
A one-bit full adder implements Sum = A xor B xor Cin and Cout = majority(A, B, Cin). Documentation and textbooks identify Σ with the Sum output; Cout is a distinct signal and is not denoted by Σ.

Step-by-Step Solution:

Verification / Alternative check:
Datasheets (e.g., 74xx/HC283 adders) show S outputs and a separate Cout pin; Σ is associated with summation, not carry.

Why Other Options Are Wrong:

Common Pitfalls:
Misreading Σ as “anything related to addition,” including carry. It designates the sum.

Final Answer:
Incorrect