Explain to me about inequality indepth

• The symbol $<$ means "less than". For example, $3 < 5$ means 3 is less than 5.
• The symbol $>$ means "greater than". For example, $7 > 2$ means 7 is greater than 2.
• The symbol $\le$ means "less than or equal to". For example, $x \le 4$ means $x$ can be 4 or any number less than 4.
• The symbol $\ge$ means "greater than or equal to". For example, $y \ge 10$ means $y$ can be 10 or any number greater than 10.

Inequalities are used to describe a range of values rather than a single value, unlike equations. For instance, if a problem states that a student must score at least 80% to pass, this can be represented by the inequality $S \ge 80$, where $S$ is the student's score. This means any score of 80% or higher will result in a passing grade.