An integer in mathematics is a whole number that can be positive, negative, or zero. Integers do not include fractions or decimals.

Key points about integers:

• They include numbers like ... -3, -2, -1, 0, 1, 2, 3, ...
• The set of integers is often denoted by the symbol ℤ.
• Integers are used for counting, ordering, and performing arithmetic operations without fractions.

Examples of integers:

• Positive integers: 1, 2, 3, 100
• Negative integers: -1, -2, -50
• Zero: 0

Integers are fundamental in many areas of math, including algebra, number theory, and computer science.