Python

• How to Print to screen?

  print (“Hello World”)
• How to print on two different lines?

  You can type the parts on different lines or use \n
• Define a variable


  Python variables are containers for storing data values.
• What is a Value?

  A value is one of the most basic things in any program works with. A value may be characters i.e. 'Hello, World! ' or a number like 1,2.2 ,3.5 etc. Values belong to different types: 1 is an integer, 2 is a float and 'Hello, World!
• IF statements

  A Python IF statement evaluates a condition and executes the indented block of code underneath it if the condition is true.

  
  

  Here’s an example:

  
  

  age = int(input("Enter your age: "))

  if age >= 18:

  print("You are an adult.")

  else:

  print("You are not an adult.")

  
  

  This code checks if the user’s age is 18 or older and prints a message accordingly.
• How to accept an answer in a python program

  To accept an answer in a Python program, you can use theinput()function to receive user input as a string, which you can then process or evaluate as needed.

  
  

  user_input = input("Please enter your name: ")

  print("Hello, " + user_input)
• If-Else Statement

  A Python IF-ELSE statement allows for two possible paths of execution: the code under IF runs if the condition is true, and the code under ELSE runs if it’s false.

  Here’s an example:

  
  

  number = int(input("Enter a number: "))

  if number % 2 == 0:

  print("The number is even.")

  else:

  print("The number is odd.")

  
  

  This code determines whether a user-entered number is even or odd.
• elif statement?


  
  

  In Python, the ELIF statement, short for ‘else if’, allows for multiple conditions to be checked in sequence after an IF statement; if a condition is true, the corresponding code block executes. Here’s an example:

  score = int(input("Enter your score: "))

  if score >= 90:

  print("Grade: A")

  elif score >= 80:

  print("Grade: B")

  elif score >= 70:

  print("Grade: C")

  else:

  print("Grade: F")

  This code assigns a grade based on the score input by the user.
• time.sleep() statement


  The time.sleep() statement in Python pauses the execution of the current thread for a specified number of seconds, allowing for timed delays in a program’s flow.

  
  

  import time

  
  

  print("Hello")

  time.sleep(2) # Pauses for 2 seconds

  print("World")

  
  

  This code will print “Hello”, wait for 2 seconds, and then print “World”.
• random module?


  In Python, the random module provides functions that generate pseudo-random numbers, such as random.randint() to get a random integer within a range.

  
  

  import random

  
  

  print(random.randint(1, 10)) # Prints a random integer between 1 and 10

  
  

  This code will output a random number between 1 and 10 each time it’s run.
• print a variable within a string


  In Python, you can print a variable within a string by using string formatting methods like f-strings, str.format(), or concatenation.

  
  

  Here’s an example using f-strings:

  
  

  name = "Alice"print(f"Hello, {name}!") # Output: Hello, Alice!
• python concatenation


  first_name = "John"

  last_name = "Doe"

  full_name = first_name + " " + last_name

  print(full_name) # Output: John Doe

  
  

  This code combines first_name and last_name into full_name and prints it.