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In Computer Basics and PC Software, functions and macros are used to automate tasks, improve code reusability, and simplify programming or spreadsheet operations. --- ### Functions: A function is a named block of code that performs a specific task when called. Functions are used in programming (like C, C++, Java) and in applications like Excel (e.g., `SUM()`, `AVERAGE()`). Features of Functions: * Can accept input (parameters) * May return a result * Defined once, can be used multiple times * Enhances modularity and readability Example in C: ```c ________ ______ ___ ________ _______ ____ _____ __________ __________.
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