| Table of Contents |
| Lcm — least common multiple |
| Gcd — greatest common divisor |
| Min — smallest value |
| Max — largest value |
| Frac — fractional part |
| Abs — absolute value |
| Intg — integer value |
| Round — round to closest integer |
| Trunc — truncate to closest integer |
| Logten — 10-base logarithm |
| LogN — N-base logarithm |
| Exp — exponential |
| Ln , Log — natural logarithm |
| Ceil — ceiling |
| Floor — floor |
| Sqrt — square root |
| Sqr — power of two |
| Random — random number |
| Average — average number |
| Sum — addition |
| Mul — product |
In mathematics, a function f is a non-empty set of ordered pairs (x, f(x)) of which no two can have the same first element. The set of all first elements in a function's ordered pairs is called the domain. The set of all second elements is the range.
Functions are used in all branches of mathematics, physics, and science generally. This section describes general functions that the Expression Calculator can perform.