C Primer Plus®, Third Edition

Which Is Bigger: Using Relational Operators and Expressions

Because while loops often rely on test expressions that make comparisons, comparison expressions merit a closer look. Such expressions are termed relational expressions, and the operators that appear in them are called relational operators. You have used several already, and Table 6.1 gives a complete list of C relational operators. This table pretty much covers all the possibilities for numerical relationships. (Numbers, even complex ones, are less complex than humans.)

Table 6.1. Relational operators.

Operator	Meaning
<	Is less than
<=	Is less than or equal to
==	Is equal to
<=	Is greater than or equal to
>	Is greater than
!=	Is not equal to

The relational operators are used to ...