Logical and Comparison Operators
Explore how to use comparison and logical operators in C++ to evaluate conditions as boolean values. Understand operator precedence, the importance of parentheses for clear logic, and how short-circuit evaluation improves safety and efficiency. This lesson prepares you to write robust conditional expressions to control program flow.
Programs often need to evaluate and manipulate data rather than simply read it. For example, we may need to check whether a password is valid, compare two scores, or verify that a value falls within an acceptable range. These kinds of checks are performed by comparison and logical operators, which allow us to test relationships between values and combine multiple conditions into a single expression.
In this lesson, we examine the syntax and behavior of these operators, which form the basis for expressing conditions in C++.
Comparison operators
Comparison operators allow us to check the relationship between two values. In C++, these operators always evaluate to a boolean value: true or false. Here are the six standard comparison operators:
Equal to (
==): Checks if two values are identical.Not equal to (
!=): Checks if two values are different.Less than (
<) and greater than ( ...