Julia Language Functions Square a number
Example
This is the easiest syntax to define a function:
square(n) = n * n
To call a function, use round brackets (without spaces in between):
julia> square(10)
100
Functions are objects in Julia, and we can show them in the REPL as with any other objects:
julia> square
square (generic function with 1 method)
All Julia functions are generic (otherwise known as polymorphic) by default. Our square function works just as well with floating point values:
julia> square(2.5)
6.25
...or even matrices:
julia> square([2 4
2 1])
2×2 Array{Int64,2}:
12 12
6 9
