I am trying to understand this code:
r = (1:10) - (4/1)
println(r)
Output:
-3.0:1.0:6.0
I understood why I got -3 and 6. But why I got that value in the middle (1.0)? How does Julia calculate it? Or how I can google it?
(first:step:last) syntax represent a Range type in Julia
typeof(1:10) # => UnitRange{Int32}
If step part is omitted, by default it is assumed 1
1:10 == 1:1:10 # => true
A Range is a compact view of a series
collect(1:10) # => 10-element Array{Int32,1}:
# 1
# 2
# 3
# 4
# 5
# 6
# 7
# 8
# 9
# 10
So it's expected that a Range type and a Vector follow the same rules e.g when you add a constant value like this:
collect(1+(1:10))==collect(1:10)+1 # => true
or even adding two vectors give you the same result of adding their range representation like this:
collect((1:10)+(1:10))==collect(1:10)+collect(1:10) # => true