index.md (1950B)
1 # Data Types 2 3 The functions of math.js support multiple data types, both native JavaScript 4 types as well as more advanced types implemented in math.js. The data types can 5 be mixed together in calculations, for example by adding a Number to a 6 Complex number or Array. 7 8 The supported data types are: 9 10 - Boolean 11 - [Number](numbers.md) 12 - [BigNumber](bignumbers.md) 13 - [Complex](complex_numbers.md) 14 - [Fraction](fractions.md) 15 - [Array](matrices.md) 16 - [Matrix](matrices.md) 17 - [Unit](units.md) 18 - String 19 20 Function [`math.typeOf(x)`](../reference/functions/typeOf.md) can be used to get 21 the type of a variable. 22 23 Example usage: 24 25 ```js 26 // use numbers 27 math.subtract(7.1, 2.3) // 4.8 28 math.round(math.pi, 3) // 3.142 29 math.sqrt(4.41e2) // 21 30 31 // use BigNumbers 32 math.add(math.bignumber(0.1), math.bignumber(0.2)) // BigNumber, 0.3 33 34 // use Fractions 35 math.add(math.fraction(1), math.fraction(3)) // Fraction, 0.(3) 36 37 // use strings 38 math.add('hello ', 'world') // 'hello world' 39 math.max('A', 'D', 'C') // 'D' 40 41 // use complex numbers 42 const a = math.complex(2, 3) // 2 + 3i 43 a.re // 2 44 a.im // 3 45 const b = math.complex('4 - 2i') // 4 - 2i 46 math.add(a, b) // 6 + i 47 math.sqrt(-4) // 2i 48 49 // use arrays 50 const array = [1, 2, 3, 4, 5] 51 math.factorial(array) // Array, [1, 2, 6, 24, 120] 52 math.add(array, 3) // Array, [3, 5, 6, 7, 8] 53 54 // use matrices 55 const matrix = math.matrix([1, 4, 9, 16, 25]) // Matrix, [1, 4, 9, 16, 25] 56 math.sqrt(matrix) // Matrix, [1, 2, 3, 4, 5] 57 58 // use units 59 const a = math.unit(55, 'cm') // 550 mm 60 const b = math.unit('0.1m') // 100 mm 61 math.add(a, b) // 0.65 m 62 63 // check the type of a variable 64 math.typeOf(2) // 'number' 65 math.typeOf(math.unit('2 inch')) // 'Unit' 66 math.typeOf(math.sqrt(-4)) // 'Complex' 67 ```