Python Tutorial - Variables & List - 002

 Diantara fungsi variable adalah untuk "storing" dan "manage" data dalam program bahasa Python.

Image 01 - Harbor front di Singapura.

Numeric Variables in Python

x= 1  ----> intger

y= 1.34  ----> float

z= True  ----Bolean

>>> x= 1

>>> y= 1.34

>>> z= True

>>> print(x)

1

>>> print(y)

1.34

>>> print(z)

True

>>> 

Beberapa operasi arithmatic dasar: tambah(+), kali(*), bagi (/) dan kurang (-):

x= 4

y= 8

tambah= x+y

kali= x*y

bagi= x/y

kurang= x-y

print(tambah)

print(kali)

print(bagi)

print(kurang)

>>> x=4

>>> y= 8

>>> tambah= x+y

>>> kali= x*y

>>> bagi= x/y

>>> kurang= x-y

>>> print(tambah)

12

>>> print(kali)

32

>>> print(bagi)

0.5

>>> print(kurang)

-4

>>> 

Image 02 - Kue manis.

LIST

List memakai tanda kurung segi empat (square bracket): [ ]. 

I= ["Ana", "Bud", "Cad", "Dom"]

print(I)

output: ['Ana', 'Bud', 'Cad', 'Dom']

Note: print all elements

print(l[0])

output: Ana

Note: print the first element

print(l[1])

output: Bud

Note: print the second element

Manipulating Lists: Adding and Removing Elements

I= ["Ana", "Bud", "Cad", "Dom"]
I.append("victoria")

print(I)

output: ['Ana', 'Bud', 'Cad', 'Dom', 'victoria']

Note: Now, 'victoria' to be fifth elements.

I= ["Ana", "Bud", "Cad", "Dom"]

I.remove("Ana")

print(I)

Output: ['Bud', 'Cad', 'Dom']

Note: No "Ana" anymore.

Sorting Lists: Ascending and Descending Order

Kita bisa menyusun (mengorganisasi) items yang ada di dalam LIST secara Ascending atau Descending.

Fungsi yang dipakai adalah: sort() by default.

I= ["Ana", "Bud", "Cad", "Dom"]

print(I)

output: ['Ana', 'Bud', 'Cad', 'Dom']

I.sort()

print(I)

output: ['Ana', 'Bud', 'Cad', 'Dom']

Untuk descending order, kita memakai fungsi: reverse()

I= ["Ana", "Bud", "Cad", "Dom"]

I.reverse()

print(I)

output: ['Dom', 'Cad', 'Bud', 'Ana']

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