Julia Examples for beginners

In this article, we’ll see 10 basic example programs using Julia.
For installation please check the article here.

1. Variable:

var = 0
var = "Dog"
print(var)

2. Function:

function changeNum()
    x = "Dog"
    print(x)
end
changeNum()

3. Line plot:

#Installing necessary modules
using Pkg
Pkg.add("Plots")
#Import necessary modules
using Plots
#data to plot
temperature = [20, 27, 26, 30, 14.5, 15]
place       = ["A", "AA", "ABC", "ACD", "BD", "CDA"]
#use GR module
gr();
figure = plot(temperature, place, label="line")
display(figure)
sleep(5)

4. Scatter Plot:

#Installing necessary modules
using Pkg
Pkg.add("Plots")
# Import necessary modules
using Plots
#data to plot
temperature = [20, 27, 26, 30, 14.5, 15]
place       = ["A", "AA", "ABC", "ACD", "BD", "CDA"]
#use GR module
gr();
figure = scatter!(temperature, place, label="points")
# @show figure
display(figure)
sleep(5)

5. Arithmetic Operations:

a = 1
b = 2
c = 3
sum      = a + b
subtract = b - c
mult     = b * a
divide   = sum/mult
println(sum)
println(subtract)
println(mult)
println(divide)
sentence = string("Hello", " Featurepreneur!")
println(sentence)
mult_sent = "Hello" * " Featurepreneur!"
println(mult_sent)

6. Slicing string:

sentence = "Just few random words"
println(length(sentence))
println(sentence[1])
println(sentence[end])
println(sentence[1:4])

7. Conditional evaluation:

x = 1
y = 2
if x < y
    println("x is lesser than y")
elseif x > y
    println("x is greater than")
else
    println("x is equal to y")
end
#In function:
function test(x, y)
    if x < y
        println("x is lesser than y")
    elseif x > y
        println("x is greater than y")
    else
        println("x is equal to y")
    end
end
test(1,2)

8. Bool operators:

age = 12
if age >= 6 && age <= 10
    println("You're in Lowhttps://docs.google.com/document/d/1OzKOuCDC6FauRYHC7PzsUfM--xVm2pZAU6_sfK-Frx0/editer Primary")
elseif age >= 11 && age <= 12
    println("You're in Upper Primary")
elseif age >= 13 && age <= 15
    println("You're in High school")
elseif age >= 17 && age <= 18
    println("You're in Higher Secondary")
else
    println("Stay Home")
end

9. Get input:

#get input from the user
val = chomp(readline())
age = parse(Int32, val)
if age >= 6 && age <= 10
    println("You're in Lower Primary")
elseif age >= 11 && age <= 12
    println("You're in Upper Primary")
elseif age >= 13 && age <= 15
    println("You're in High school")
elseif age >= 17 && age <= 18
    println("You're in Higher Secondary")
else
    println("Stay Home")
end

10. Tuple:

t1 = (1,2,3,4)
println(t1)
# Get a value
println(t1[1])
# Get all
for i in t1
    println(i)
end