Python IDE by 101Computing.net

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#Maths Puzzles - www.101computing.net/maths-puzzles/
​
# What 2 square numbers subtract to make 31?
​
#We will only test positive numbers up to 1,000!
for i in range(0,1000):
  for j in range(0,i):
    if (i**2 - j**2) == 31:
       print(i)
       print(j)
       print(str(i) + "**2 - " + str(j) + "**2 = " + str(i**2) + " - " + str(j**2) + " == 31")
​
​
​
​
​

task_alt

keyboardInputsstat_minus_1
- # Text inputname = input("Enter your name:")
- # Whole number inputage = int(input("Enter your age:"))
- # Decimal number inputprice = float(input("Enter a price:"))
computerOutputsstat_minus_1
- # Output text print("Hello World")
- # Output text + variable (String) print("Hello " + playerName)
- # Output text + variable (Integer/Float) score = 5
  print("Your score: " + str(score))
- # Pause (e.g. 1 second)import time
  time.sleep(1)
- # Clear the screenimport os
  os.system("clear")
note_stack_addVariables and Arithmetic Operatorsstat_minus_1
- # Initialising variables and constants of different data types: score = 0
  PI = 3.14
  message = "Hello World"
  soundOn = True
- # Arithmetic Operators: x = a + b # Add
  x = a – b # Take away
  x = a / b # Divide
  x = a * b # Multiply
  x = a ** 2 # to the power of
  x = a // b # Quotient DIV
  x = a % b # Remainder MOD
  
  x += 1 # Increment x by 1
  x -= 1 # Decrement x by 1
  x *= 2 # Multiply x by 2
  x /= 2 # Divide x by 2
- # Rounding a number: pi = 3.14159
  pi2 = round(pi,2)
  print("Pi rounded to two decimal places: " + str(pi2)) # 3.14
arrow_splitSelection: if, elif, else...stat_minus_1
- if numberOfLives == 0:
  print("Game Over!")
- if numberOfLives == 0 or timer<=0:
  print("Game Over!")
  else:
  print("Carry on playing!")
- if number < 0:
     print("Negative Number")
  elif number == 0:
     print("Zero")
  else:
     print("Positive Number")
- if number == 7:
     print("Seven")
  elif number == 8:
     print("Eight")
  elif number == 9:
     print("Nine")
  else:
     print("Not seven, eight or nine")
autorenewIteration: for loops & While loopsstat_minus_1
- # For loop to count from 1 to 10 for i in range(1,11):
  print(i)
- # For loop to count in 5 from 0 to 100 for i in range(0,101,5):
  print(i)
- # For loop to count down from 10 to 1 using a negative step for i in range(10,0,-1):
  print(i)
- # Iterate through all the values of a list days = ["Mon", "Tue", "Wed", "Thu", "Fri"]
  for i in range(0,len(days)):
  print(days[i])
- # Iterate through all the values of a list - Alternative approach for day in days:
  print(day)
- # Iterate through all the characters of a string string = "Hello World"
  for character in string:
  print(character)
- # Using a while loop i=0
  while i<=100:
  print(i)
  i = i + 1
- # To exit from/break a loop at any time: while True:
     # ...
     if timer==0:
        break
settingsFunctionsstat_minus_1
- # Define a new proceduredef displayBanner(message):
     print("---------------")
     print(message)
     print("---------------")
  
  # Procedure call displayBanner("Hello World!")
- # Define a new functiondef add(x, y):
  sum = x + y
  return sum
  
  # Function call total = add(1,3)
  print(total) # this would display 4
match_caseString Manipulationstat_minus_1
- # String Concatenation firstname = "James"
  lastname = "Bond"
  greeting = "Hello " + firstname + " " + lastname
  print(greeting)
- # Casting a number into a String number = 7
  print("Your lucky number is " + str(number))
- # Changing the case of a string name = "james BOND"
  uppercase = name.upper() # JAMES BOND
  lowercase = name.lower() # james bond
  titlecase = name.title() # James Bond
- # Retrieving the number of characters in a string password = "Pa55w0rd"
  passwordLength = len(password)
- # String Slicing: Extracting characters from a string alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  print("The fifth letter of the alphabet is: " + alphabet[4])
  print("The first 5 letters are: " + alphabet[:5])
  print("The next 5 letters are: " + alphabet[5:10])
  print("The last 5 letters are: " + alphabet[-5:])
- # Iterate through all the characters of a string string = "Hello World"
  for character in string:
  print(character)
live_helpRandom Librarystat_minus_1
- # Import the random library import random
- # Generate a random number between 1 and 100 randomNumber = random.randint(1,100)
- # Pick a value in a list at random names = ["Fred","Ali","Ines"]
  randomName = random.choice(names)
- # To shuffle a list numbers = [1,2,3,4,5]
  random.shuffle(numbers)
- # Use ASCII codes to generate a random letter (A to Z) randomLetter = chr(random.randint(65,90))
storageData Structures: Lists, Tuples and Dictionariesstat_minus_1
- # Declaring a list and accessing its values days = ["Mon","Tue","Wed","Thu","Fri","Sat"]
  days.append("Sun")
  print(days[0]) # "Mon"
  print(days[1]) # "Tue"
  print(days[2]) # "Wed
  …
  print(days[6]) # "Sun"
- # Finding out the number of items in a list (length of a list) print(len(days)) # 7
- # Iterate through all the values of a list for i in range(0,len(days)):
  print(days[i])
- # Iterate through all the values of a list - Alternative method for value in days:
  print(value)
- # Adding a new value at the end of a list numbers = [1,3,5]
  numbers.append(7)
- # Removing a value from a list days = ["Mon","Tue","Wed","Thu","Fri"]
  numbers.remove("Wed")
- # Removing a value from a list at a given position days = ["Mon","Tue","Wed","Thu","Fri"]
  numbers.pop(2) # remove the third item from this list: "Wed"
- # Declaring a tuple magenta = (255,0,255)
  print("R: " + str(magenta[0]))
  print("G: " + str(magenta[1]))
  print("B: " + str(magenta[2]))
- # Using a Dictionary (Hash table) dictionary = {"One":"Un", "Two":"Deux", "Three":"Trois"}
  print("One in French is " + dictionary["One"])
- # Adding an extra key to a dictionary dictionary["Four"] = "Quatre"
descriptionFile Handlingstat_minus_1
- # Reading a text file, line by line file = open("myTextFile.txt","r")
  for line in file:
  print(line)
  file.close()
- # Reading and extracting data from a CSV file, line by line file = open("myTextFile.txt","r")
  for line in file:
  data = line.split(",")
  print(data[0] + " - " + data[1] + " - " + data[2])
  file.close()
- # Overwriting the content of a text file file = open("myTextFile.txt","w")
  file.write("Hello World\n")
  file.close()
- # Appending data at the end of a text file file = open("myTextFile.txt","a")
  file.write("Hello World\n")
  file.close()
select_check_boxInput Validationstat_minus_1
- # Input Validation: Presence Check name = input("Enter your name:")
  if name=="":
  print("Empty name!")
  else:
  print("Thank you!")
- # Input Validation: Type Check – Integer? number = input("Type a number:")
  if number.isdigit():
  print("This is a number")
  else:
  print("This is not a whole number")
- # Input Validation: Range Check number = int(input("Type a number between 1 and 5:"))
  if number>=1 and number<=5:
  print("Valid number")
  else:
  print("Invalid number")
- # Input Validation: Lookup Check drive = input("Can you drive?").lower()
  if drive in ["yes","no"]:
  print("Valid answer")
  else:
  print("Invalid answer")
- # Input Validation: Character Check email = input("Type your e-mail address:")
  if "@" in email:
  print("Valid e-mail address")
  else:
  print("Invalid e-mail address")
- # Input Validation: Length Check password = input("Type a password:")
  if len(password)>=8:
  print("Valid password")
  else:
  print("Invalid password")
- # Try Again! Using a While Loop: name = input("Enter your name:")
  while name=="":
  print("You must enter your name! Please try again!")
  name = input("Enter your name:")
  print("Welcome " + name)
manufacturingOOPstat_minus_1
- import random
  
  # Defining a Dice class class Dice():    # Constructor for the Dice class    def __init__(self,numberOfSides=6):
        self.numberOfSides = numberOfSides
        self.value = 1
  
     def throw(self):
        self.value = random.randint(1,self.numberOfSides)
        return self.value
  
  # Instantiating a dice object using the Dice class dice = Dice(6)
  dice.throw()
  print(dice.value)