Skip to content
This repository has been archived by the owner on Oct 26, 2022. It is now read-only.
/ JuliaByExample Public archive
Switch branches/tags
Could not load branches
Nothing to show

# Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Cannot retrieve contributors at this time
34 lines (29 sloc) 1.38 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
 # [function](https://docs.julialang.org/en/v1/manual/functions/#man-functions-1) to calculate the volume of a sphere function sphere_vol(r) # julia allows [Unicode names](https://docs.julialang.org/en/v1/manual/unicode-input/#Unicode-Input-1) (in UTF-8 encoding) # so either "pi" or the symbol π can be used return 4/3*pi*r^3 end # functions can also be defined more succinctly quadratic(a, sqr_term, b) = (-b + sqr_term) / 2a # calculates x for 0 = a*x^2+b*x+c, [arguments types](https://docs.julialang.org/en/v1/manual/functions/#Further-Reading-1) can be defined in function definitions function quadratic2(a::Float64, b::Float64, c::Float64) # unlike other languages 2a is equivalent to 2*a # a^2 is used instead of a**2 or pow(a,2) sqr_term = sqrt(b^2-4a*c) r1 = quadratic(a, sqr_term, b) r2 = quadratic(a, -sqr_term, b) # multiple values can be returned from a function using tuples # if the [return](https://docs.julialang.org/en/v1/manual/functions/#The-return-Keyword-1) keyword is omitted, the last term is returned r1, r2 end vol = sphere_vol(3) # @printf allows number formatting but does not automatically append the \n to statements, see below using Printf @printf "volume = %0.3f\n" vol #> volume = 113.097 quad1, quad2 = quadratic2(2.0, -2.0, -12.0) println("result 1: ", quad1) #> result 1: 3.0 println("result 2: ", quad2) #> result 2: -2.0