👉 In mathematics, an irrational number is a real number that cannot be expressed as a ratio of two integers. In other words, it has non-terminating and non-repeating decimal expansion. For example: - The square root of 2 (approximately 1.41) is an irrational number. - π (pi), the mathematical constant approximately equal to 3.14159, is also an irrational number. - √(7) ≈ 2.6
