Python - Loops (Day 5)

This is a 100 Days challenge to learn a new language (Python). 100 Days of Code - The Complete Python Pro Bootcamp 

I will post some notes to motivate myself to finish this challenge.

Loop for List

Ex:

# Define a list

fruits = ["Apple", "Banana", "Pear"]

print(fruits)

# Iterate a list

for fruit in fruits:

    print(fruit)

Result:

['Apple', 'Banana', 'Pear'] Apple Banana Pear

Common function for List

Ex:

scores = [1, 2, 3, 4, 5, 6]

print(f"max: { max(scores) }")

print(f"min: { min(scores) }")

print(f"len: { len(scores) }")

print(f"sum: { sum(scores) }")

Result:

max: 6 min: 1 len: 6 sum: 21

Loop with range()

Generate a range of a number Reference

Ex:

# NOTE: The second parameter is for STOP!

for number in range(1, 5):

    print(number)

Result:

1

2

3

4

Challenge - Find the max value from a list

Ex:

# NOTE: You are not allowed to use the max or min functions.

# Get user input

student_scores = input("Input a list of student scores ").split()

for n in range(0, len(student_scores)):

    student_scores[n] = int(student_scores[n])

print(student_scores)

# Define a variable for max

max = 0

# Iterate all score

for score in student_scores:

    # Store the bigger value

    if score > max:

        max = score

print(f"The highest score in the class is: { max }")

Result:

Input a list of student scores 1 2 3 [1, 2, 3] The highest score in the class is: 3

Challenge - Calculate sum of even number from 1 to 100

Ex:

# NOTE: Should use range() function in this exercise

count = 0

for number in range(2, 101):

    if number % 2 == 0:

        count += number

print(count)

Result:

2550

Challenge - PWD Generator

Ex:

# Password Generator Project

import random

letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',

'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y',

           'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',

'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',

'Z']

numbers = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']

symbols = ['!', '#', '$', '%', '&', '(', ')', '*', '+']

print("Welcome to the PyPassword Generator!")

nr_letters = int(input("How many letters would you like in

your password?\n"))

nr_symbols = int(input(f"How many symbols would you like?\n"))

nr_numbers = int(input(f"How many numbers would you like?\n"))

pwd_list = []

pwd = ''

# Eazy Level - Order not randomised:

# e.g. 4 letter, 2 symbol, 2 number = JduE&!91

for _ in range(0, nr_letters):

    pwd_list.append(random.choice(letters))

for _ in range(0, nr_symbols):

    pwd_list.append(random.choice(symbols))

for _ in range(0, nr_numbers):

    pwd_list.append(random.choice(numbers))

print(pwd_list)

# Hard Level - Order of characters randomised:

# e.g. 4 letter, 2 symbol, 2 number = g^2jk8&P

random.shuffle(pwd_list)

for s in pwd_list:

    pwd += s

print(pwd)

Result:

Welcome to the PyPassword Generator! How many letters would you like in your password? 6 How many symbols would you like? 2 How many numbers would you like? 2 ['N', 'u', 't', 'Z', 'd', 'A', ')', '+', '8', '8'] uA8Z)Nt8d+