Integer - GCSE Maths Definition

What is an integer?

In GCSE maths, an integer is a whole number that is positive, negative or zero. Some examples of integers are 1, 5, 23, 898, 0, -2, -700, … etc. There are an infinite number of positive integers and negative integers.

Examples of numbers that are not integers include any number with a decimal part (such as 3.25, -6.8, 0.333… etc.) or any mixed numbers with fractional parts (such as 2 ⅓ or 6 ½). Irrational numbers, such as 𝜋 (pi) and √2 (the square root of 2), are not integers as they have never-ending decimal parts with no repeating patterns.