How to Efficiently Compare a Variable Against a Range of Values in Programming?

Comparing a Variable to a Range of Values

In mathematics, the notation 18 < age < 30 denotes that age must lie between the values 18 and 30. This notation allows for a concise and clear way to define a range of acceptable values.

When programming, it may be desirable to use a similar notation to compare a variable to a range of values. For example, one may want to check if a user's age is between 18 and 30, inclusive.

However, attempting to use the mathematical notation directly in an if statement will result in an error. For instance, the following code:

if(18 < age < 30)

will not compile because the < operator has a higher precedence than the < operator. This can be addressed by using the && operator to combine the two conditions:

if (18 < age &amp;&amp; age < 30)

This notation allows the program to check if the value of age is greater than 18 and less than 30, effectively defining a range of acceptable values.

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