Integer numbers are whole numbers that can be positive, negative, or zero. They do not include fractions or decimals. For example, the set of integers includes numbers like -3, -2, -1, 0, 1, 2, 3. Integers are used in various mathematical operations and are fundamental in number theory. In mathematics, integers are often represented by the symbol Z, which comes from the German word "Zahlen," meaning "numbers." They are essential for counting, ordering, and performing calculations. Integers are widely used in everyday life, such as in measuring temperatures, tracking scores, and managing finances.