Julia 1.0 Programming Complete Reference Guide

Floating-point numbers

Floating-point numbers are represented by numerical values separated by a dot:

julia> 3.14 
3.14 julia> -1.0 
-1.0 julia> 0.25 
0.25 julia> .5  
0.5  

By default they are Float64 values, but they can be converted to Float32:

julia> typeof(1.) 
Float64 julia> f32 = Float32(1.) 
1.0f0 julia> typeof(f32) 
Float32 
 

To improve readability, the underscore (_) separator can be used with both integers and floats:

julia> 1_000_000, 0.000_000_005 
(1000000, 5.0e-9)