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Codes and contents for the Day 1 class

Variables and Data Types

This section covers the basics of variables and data types in Python. Some of the data types are:

Integer, Float, String, Boolean, List, Tuple, Dictionary

Integer is a whole number, like 4, 5, 6.

Float is a decimal number, like 4.5, 5.6, 6.7.

String is a sequence of characters, like "Hello", "World".

Boolean is a value that can be either True or False.

List is a collection of items, like [1, 2, 3], ["apple", "banana", "cherry"].

Tuple is a collection of items, like (1, 2, 3), ("apple", "banana", "cherry").

Dictionary is a collection of key-value pairs, like {"name": "Asib", "age": 21}.

variables_and_data_types.py
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a = 4   #(1)
b: int = 5  #(2)
name = "Muhammad"   #(3)
age = 25    #(4)
height = 1.89   #(5)
is_married = True   #(6)
  1. Integer variable
  2. Integer variable with type annotation
  3. String variable
  4. Integer variable
  5. Float variable
  6. Boolean variable

String Formatting and Printing

string_formatting_and_printing.py
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name = "Muhammad"
age = 25
height = 1.89
is_married = True

print(f"My name is {name}. I am {age} years old. And I am {height} meters tall.")    #(1)
print("My name is {}. I am {} years old. And I am {} meters tall.".format(name, age, height))   #(2)
print("My name is ", name, "I am ", age, "years old.")      #(3)
print("My name is " + name + ". " + "I am " + str(age) + "years old.")      #(4)
  1. String formatting with f-string
  2. String formatting with format method
  3. String concatenation with comma without type casting
  4. String concatenation with + operator with type casting

Type Casting or Converting Data Types

type_casting.py
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a = "10"
b = int(a)    #(1)
print(b)
  1. Type casting from string to integer

List Operations

List Creation

list_creation.py
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names = ["Asib", "Khalid", "Bappy"]
data = ["Asib", 21, "Khalid", 25, "Bappy", 22]

List Accessing from index

list_indexing.py
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print(names[0])    #(1)
print(data[2])    #(2)
  1. 'Asib'
  2. 'Khalid'

List Slicing

list_slicing.py
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asibs_data = data[:2]    #(1)
khalids_data = data[2:4]    #(2)
random_data = data[3:]    #(3)
  1. ['Asib', 21]
  2. ['Khalid', 25]
  3. ['Bappy', 22]

List Modification

list_copying.py
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asibs_data[1] = 22    #(1)
data[3] = 26    #(2)
  1. Modifying the value of index 1
  2. Modifying the value of index 3

List Copying

The script demonstrates two methods for copying lists: - Using list() function: data2 = list(data) - Using slicing: data3 = data[:]

list_copying.py
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data2 = list(data)    #(1)
data3 = data[:]    #(2)
  1. Copying the list using list() function
  2. Copying the list using slicing