Julia 1.0 Programming Complete Reference Guide

Rational numbers

Julia also provides a Rational number type. This allows us to work with exact ratios, instead of having to deal with the precision loss inherent in floats. Rational numbers are represented as their numerator and denominator values, separated by two forward slashes //:

julia> 3//2 
3//2

Rational numbers can be converted to other types, if there is no data loss:

julia> 1//2 + 2//4 
1//1 
 
julia> Int(1//1) 
1 
 
julia> float(1//3) 
0.3333333333333333 
 
julia> Int(1//3) 
ERROR: InexactError: Int64(Int64, 1//3) 
 
julia> float(1//3) == 1/3 
true 

Julia also includes support for Complex numbers. We won't discuss, them but you can read about the topic in the official documentation at https://docs.julialang.org/en/v1/manual/complex-and-rational-numbers/#Complex-Numbers-1 ...