El jueves, 10 de noviembre de 2016, 0:43:19 (UTC-5), wan...@terpmail.umd.edu escribió: > > > > Hi guys, > > I am new to Julia and learning from scratch. I ran into the compound > expression like this: > > > tri=base=5;height=10;1/2*base*height > > > This is to calculate the triangle area. The result is right. But I am > concerned about the value of "tri". What is it after the calculation. > Shouldn't it be 25? Julia told me it is 5!! > > Can anybody help me with this? >
If you actually want the result assigned to tri, you can do it by adding parentheses to what you wrote: julia> tri1 = (base = 5; height = 10; 0.5 * base * height) 25.0 julia> tri1 25.0 (Note that the code is more readable with more space.) However, what you are really trying to do is make something that, given a base and a height, calculates the area, i.e. a function. So it is more natural (and reusable) to do something like this: julia> triangle_area(base, height) = 0.5 * base * height tri (generic function with 1 method) julia> base, height = 5, 10 (5,10) julia> triangle_area(base, height) 25.0 This has the advantage that you can also reuse the variables base and height later. (Note also that `base` is a function defined in the Julia standard library (which itself is called `Base`!) and this code overwrites it when run in global scope.)
