In [1]:
## Here is a block of julia code
# The two ## characters denote the start of the block
# If I type option-enter (on a mac) or alt-enter (Windows/Linux)
# then it will run the entire block
function squared(x)
  return x*x
end 

function add_values(x,y) 
  return x + y
end 

add_values(squared(6), squared(6))
Out[1]:
72
In [2]:
## Let's look at plotting quickly
using CairoMakie # what I use now...
In [3]:
## 
using Plots # what I've used in the past... 

x = range(1, step=10, length=100)
y = cumsum(rand(100))

plot(x,y) # this will plot the data
 

WARNING: both Plots and CairoMakie export "plot"; uses of it in module Main must be qualified

UndefVarError: `plot` not defined

Stacktrace:
 [1] top-level scope
   @ In[3]:7
In [4]:
##
x = rand(10000)
y = randn(10000)
plot(
  histogram(x, xlabel="Value", ylabel="Count", title="rand"), 
  histogram(y))

UndefVarError: `plot` not defined

Stacktrace:
 [1] top-level scope
   @ In[4]:4