harp150_Lab_5_loops.ipynb

{"nbformat":4,"nbformat_minor":0,"metadata":{"colab":{"provenance":[],"authorship_tag":"ABX9TyMpftGWyBC/IzGaZ1+3UVu2"},"kernelspec":{"name":"python3","display_name":"Python 3"},"language_info":{"name":"python"}},"cells":[{"cell_type":"markdown","source":["https://docs.google.com/presentation/d/1WyzPHaWffCkoOMdPRNeaw3tWtHYYl7FlZH55iQDpbcY/edit?usp=sharing"],"metadata":{"id":"Ex1CqpdhfDi6"}},{"cell_type":"code","execution_count":null,"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"boh3rYcjXsfP","executionInfo":{"status":"ok","timestamp":1708027673072,"user_tz":300,"elapsed":29,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"f396fb4e-afed-49a0-e2cf-6b822f2712d6"},"outputs":[{"output_type":"stream","name":"stdout","text":["0\n","1\n","2\n","3\n","4\n","5\n","6\n","7\n"]}],"source":["number = range(0,8) # number = 0,1,2,3,4,5,6,\n","for nums in number:\n","  print(nums)\n","\n","#what is oging to ahppen when we change this range to range(9,15)?\n","\n","#"]},{"cell_type":"markdown","source":["Ranges\n"],"metadata":{"id":"-wi5KqwaYrhc"}},{"cell_type":"code","source":["for item in range(18):\n","  print(item, end = \" \")\n","\n","  #when the range is just one number, it means that it is from 0 to a number before the number listed. all are listed in integers\n"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"_tjOd83LYtNn","executionInfo":{"status":"ok","timestamp":1708027755599,"user_tz":300,"elapsed":173,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"5cfe7780-60ed-4ca8-9c46-41e510dd3a32"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 "]}]},{"cell_type":"code","source":["for number in range(1,39,3):\n","  print(number, end = \" \")\n","\n","  # what does this mean??\n","  # (start, stop, steps by this many)\n","  #\n"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"jh5YSXY0Y9LL","executionInfo":{"status":"ok","timestamp":1708027813722,"user_tz":300,"elapsed":124,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"2a665e95-6cfa-4efa-ef30-3f17af83c23c"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["1 4 7 10 13 16 19 22 25 28 31 34 37 "]}]},{"cell_type":"code","source":["#the range makes you count from one argument of something.\n","\n","for number in range (0,100,5):\n","  print(number, end = \" \")"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"ghy2MlroZTxM","executionInfo":{"status":"ok","timestamp":1708028034821,"user_tz":300,"elapsed":130,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"249b97f9-cdcf-46e1-8162-6c02a6f2f027"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 "]}]},{"cell_type":"code","source":["#exercise 1\n","\n","# Create a for loop that tells us how many multiples of 4 there are in the number 100\n","\n","for number in range(0,100,4):\n","  print(number, end = \" \")\n","\n"," # when you print something, and put something at the end, it means it changes how it prints"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"UAfhCjpqZ7Tk","executionInfo":{"status":"ok","timestamp":1708028422527,"user_tz":300,"elapsed":187,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"032772f5-1888-4b67-875d-09d7a45ac8bc"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 "]}]},{"cell_type":"code","source":["#exercise 1 also works like this\n","\n","count = 0\n","for num in range(100):\n","  if num % 4 == 0:\n","    count = count +1\n","print(count)\n","\n","# what this is saying is that count is = to zero\n","#whenever the number is within 0 to 100,\n","# and if the nubmer is easily divisible by for and equal to zero\n","# add 1 to ocunt\n","#then you print the new ocunt"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"lrAHPtQMbPiL","executionInfo":{"status":"ok","timestamp":1708028584007,"user_tz":300,"elapsed":113,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"d4c3afe4-61eb-4827-f1a0-4505a1c50187"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["25\n"]}]},{"cell_type":"code","source":["#loop over a list rather than a range\n","#For loops allow us to iterate over a list, dictionary, or range of numbers.\n","\n","flowers = [\"rose\", \"daffodil\", \"bluebell\", \"lily\", \"violet\"]\n","\n","#the flower here is the flower is currently unassigned,\n","#but it gets assigned when it goes through the list\n","\n","flower = input(\"what flower would you like? \")\n","for flower in flowers:\n","  print(flower)\n","  print(\"would you like a\" , flower + \"?\")"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"AMDeYH0VcYZS","executionInfo":{"status":"ok","timestamp":1708028980514,"user_tz":300,"elapsed":2312,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"fd76ba65-ff7e-46d9-e0bc-952ccd31f8f1"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["what flower would you like? rose\n","rose\n","would you like a rose?\n","daffodil\n","would you like a daffodil?\n","bluebell\n","would you like a bluebell?\n","lily\n","would you like a lily?\n","violet\n","would you like a violet?\n"]}]},{"cell_type":"code","source":["#exercise 2\n","\n","# create a list of all the members in your immediate family\n","# iterate through that list with a for loop and print off each of their names\n","#for loops are a lot different than if/elif.\n","#if/elif statements perform one thing if it is told about something\n","\n","\n","family = [\"joshua\", \"isabell\",\"fanchi\", \"emily\"]\n","\n","for member in family:\n","  print( member, \"Cheuk\", end = \", \")"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"FuWNfUp8dgRX","executionInfo":{"status":"ok","timestamp":1708029202258,"user_tz":300,"elapsed":150,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"d3a19ab4-2db2-40d9-f141-178c91dd8cad"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["joshua Cheuk, isabell Cheuk, fanchi Cheuk, emily Cheuk, "]}]},{"cell_type":"code","source":["#using loops with dictionaries:\n","#check slide as well\n","#let's go through this code:\n","\n","desserts = {\"cake\": 23, \"pie\": 12,\n","            \"cookies\":3, \"brownies\":5}\n","\n","#make something that lists all the\n","plenty= []\n","for dessert in desserts:\n","    if desserts[dessert] >= 10:\n","      print(\"we've got plenty of \"+ dessert + \"!\")\n","      plenty.append(dessert)\n","    elif desserts[dessert] < 10:\n","      print(\"get your\", dessert, \"soon!\")\n","print(\"we've got plenty of\", plenty)\n","\n"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"TN5PWwIMeVa7","executionInfo":{"status":"ok","timestamp":1708029574030,"user_tz":300,"elapsed":27,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"71349af2-1d4e-4b25-b3a8-3f56e810d8de"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["we've got plenty of cake!\n","we've got plenty of pie!\n","get your cookies soon!\n","get your brownies soon!\n","we've got plenty of ['cake', 'pie']\n"]}]},{"cell_type":"markdown","source":["What is a while loop? when should you use them?\n","\n","A for loop is used for a specific length of items to loop through\n","\n","a while loop is used to repeat a block of code until a condition is met\n","\n","While loops are used when you do not have a preexisting finite set of information to loop through (like a range, list, or dictionary)\n","They will always have a condition and the code indented after it will be run while that condition is true and stop when it becomes false.\n","Sometimes the condition is never false and the loop will run forever! That is called an “infinite loop” and you rarely want one.\n"],"metadata":{"id":"SaVItvbSfIkD"}},{"cell_type":"code","source":["# example let's go through this line by line on the board:\n","\n","x = 1\n","total = 0\n","\n","while x <= 10:\n","  total += x #this means that x +total = total. the new total is x + total\n","  x += 1 #x + 1 = X . this means that x is x + 1, because there's a new value of x every time,\n","  print(x)\n","print(total)\n","\n","# if you don't know what math it's doing,\n","#tell the computer to print the variable to see the numbers\n","#to check how x and total are changing, ask computer to print them"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"jpyJLjuJfAJA","executionInfo":{"status":"ok","timestamp":1708029970396,"user_tz":300,"elapsed":30,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"eb14591e-654f-46f2-ad3f-27e03a328ed1"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["2\n","3\n","4\n","5\n","6\n","7\n","8\n","9\n","10\n","11\n","55\n"]}]},{"cell_type":"markdown","source":["Multiple conditions:\n","\n","while loops can be created with a couple"],"metadata":{"id":"BS0Vd1aGh5NI"}},{"cell_type":"code","source":["x = 38\n","y = 72\n","while x < 50 and y < 100:\n","  x = x +1\n","  y = y + 1\n","  print(x,y)\n"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"n3o18qmyht2B","executionInfo":{"status":"ok","timestamp":1708030514335,"user_tz":300,"elapsed":159,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"9f6c9132-810d-4875-eb3a-889d4d445139"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["39 73\n","40 74\n","41 75\n","42 76\n","43 77\n","44 78\n","45 79\n","46 80\n","47 81\n","48 82\n","49 83\n","50 84\n"]}]},{"cell_type":"markdown","source":[],"metadata":{"id":"IGOv69zYiZPw"}},{"cell_type":"code","source":["# Exercise #3:\n","\n","# Create the variable child, assign it the integer 0\n","# Create a while loop that runs as long as child is less than or equal to 18\n","# Make sure to use your addition assignment operator (+=)\n","\n","\n","child = 0\n","while child <= 18:\n","  print(child)\n","  child += 1\n","\n","# make sure when you're adding things, you're making sure the things you print are being\n","# while child <= 18:\n","#   child += 1\n","#   print(child)\n","# before the print happens, child will = 18, so it will continue to print one more time until\n","# it child = 19"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"CMz8v7rYiWtJ","executionInfo":{"status":"ok","timestamp":1708030658410,"user_tz":300,"elapsed":154,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"5ab2e258-758a-4d62-b4f6-e86f6910b192"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["0\n","1\n","2\n","3\n","4\n","5\n","6\n","7\n","8\n","9\n","10\n","11\n","12\n","13\n","14\n","15\n","16\n","17\n","18\n"]}]},{"cell_type":"code","source":[],"metadata":{"id":"2nuil3aCkkW5"},"execution_count":null,"outputs":[]},{"cell_type":"markdown","source":["The else statemtn doesn't have any other if/elif statemtns in it b/c\n","\n","Like with if / elif / else statements, the else clause will be executed when the while loop is no longer true (aka when it becomes false)\n"],"metadata":{"id":"-HxlKo_nklGU"}},{"cell_type":"code","source":["\n","child = 0\n","while child <= 18:\n","  print(child)\n","  child += 1\n","else:\n","  print( \"you're an adult now\")"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"Ob3dQhuYkr57","executionInfo":{"status":"ok","timestamp":1708030892850,"user_tz":300,"elapsed":335,"user":{"displayName":"Joshua Cheuk","userId":"09800220979386665615"}},"outputId":"31f1244e-bd18-4b27-cab9-637f16da5b2d"},"execution_count":null,"outputs":[{"output_type":"stream","name":"stdout","text":["0\n","1\n","2\n","3\n","4\n","5\n","6\n","7\n","8\n","9\n","10\n","11\n","12\n","13\n","14\n","15\n","16\n","17\n","18\n","you're an adult now\n"]}]},{"cell_type":"code","source":["# Exercise #4:\n","# Copy this code into your JN and comment each line to explain what is happening\n","\n","enrollment = 0\n","#enrollment is equal to zero\n","class_capacity = 15\n","# the class capacity is 15\n","while enrollment < class_capacity:\n","  #when the enrollment number is less than the class capacity ...\n","  print(\"there are \", enrollment, \"students enrolled. \")\n","  # you print there \"insert students enrolled\" here\n","  enrollment += 1\n","  # if the enrollment continues to be less than the class capacity,\n","  #you add 1 to the current enrollment\n","else:\n","  print(\"this class is full.\")\n","  #when the enrollment is greater than 15, you print \"this class is full\"\n","\n"],"metadata":{"id":"XUryXchWkz1M"},"execution_count":null,"outputs":[]},{"cell_type":"markdown","source":["After your lab, review the next four slides on using break & continue. You can learn more about them from this website too.\n","https://www.programiz.com/python-programming/break-continue\n","\n"],"metadata":{"id":"vP-U5doJmmgM"}},{"cell_type":"markdown","source":[],"metadata":{"id":"liJP7QPamqvC"}}]}