Math

• Integers


  Whole numbers (excluding fractions) and their negatives, e.g. ..., -3, -2, -1, 0, 1, 2, 3, ... (Z)
• Rational Numbers


  Numbers that can be expressed as a fraction , e.g. 1/2, 3/4, 22/7 (Q)
• Irrational Numbers


  Numbers that cannot be expressed as a ratio of two integers, e.g. π, e, √2 (Q')
• Real Numbers


  Includes all rational and irrational numbers, e.g. 1, √2, 3.14, -π. (IR)
• Natural Number


  A positive integer, excluding 0. Examples: 1, 2, 3, ... ( IN)