How Can I Check if a Variable Falls Within a Specific Range in an `if` Statement?

Comparing Variables to Value Ranges

The if statement is a fundamental control structure in programming languages, allowing us to execute code based on specific conditions being met. However, sometimes we may encounter situations where we want to compare a variable not only to a single value but within a range of values.

Take, for instance, the following mathematical notation: 18 < age < 30. This indicates that the variable age must lie between the values of 18 and 30. While the if statement supports comparisons with individual values, it does not directly offer a straightforward way to express range constraints.

To achieve this, we need to harness the power of logical operators, namely the "and" operator (&&). By combining multiple comparisons with the && operator, we can effectively assess whether a variable falls within a desired range. Consider the following code snippet:

if (18 < age &amp;&amp; age < 30) {
  // Code to be executed if age is between 18 and 30
}

In this example, we use the expression (18 < age && age < 30) to check if both conditions are satisfied. If age is greater than 18 and less than 30, the code within the if statement block will be executed.

This technique allows us to easily check for membership in a range of values using the if statement, providing a convenient way to represent mathematical notations like 18 < age < 30 in our code.

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