lesson40_whileloops_counting.ipynb

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    {
      "cell_type": "markdown",
      "source": [
        "Lesson 39 is on While Loops Counting"
      ],
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    {
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          "text": [
            "0\n",
            "1\n",
            "2\n",
            "3\n",
            "4\n",
            "5\n",
            "6\n",
            "7\n",
            "8\n",
            "9\n"
          ]
        }
      ],
      "source": [
        "n = 0\n",
        "while n <= 9:\n",
        "  print(n)\n",
        "  n += 1"
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# what about multiples of 10?\n",
        "# we'll stop at 90\n",
        "\n",
        "n = 10\n",
        "while n <= 90:\n",
        "  print(n)\n",
        "  n+=10"
      ],
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          "name": "stdout",
          "text": [
            "10\n",
            "20\n",
            "30\n",
            "40\n",
            "50\n",
            "60\n",
            "70\n",
            "80\n",
            "90\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "x = 5\n",
        "while x >= 1: # bound!\n",
        "  print(x)\n",
        "  x -= 1\n",
        "print(\"Liftoff!\")"
      ],
      "metadata": {
        "colab": {
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        "id": "_QuD8mK8eOlC",
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      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "5\n",
            "4\n",
            "3\n",
            "2\n",
            "1\n",
            "Liftoff!\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "n = 1\n",
        "total = 0\n",
        "while n<=10: # will run 10 times\n",
        "  total += n # adds to the piggy bank and keep tabs...1+2+3..\n",
        "  n+= 1 # this creates the new value of n to continue in the loop until it's 11\n",
        "print(total) # the sum of total values from 1 to 10"
      ],
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        "id": "0FDQCxSrexuJ",
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          "text": [
            "55\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "n = 10\n",
        "while n >= 1:  # Loop runs as long as n is 1 or greater\n",
        "  print(n)     # Prints the current value of n\n",
        "  n -= 1       # Decreases n by 1 on each iteration\n",
        "print(\"Blastoff!\")  # Prints after the loop finishes"
      ],
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          "text": [
            "10\n",
            "9\n",
            "8\n",
            "7\n",
            "6\n",
            "5\n",
            "4\n",
            "3\n",
            "2\n",
            "1\n",
            "blastoff!\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "n = 5  # You can change this to any number\n",
        "factorial = 1  # Start with 1 because multiplying by 1 doesn't change the result\n",
        "\n",
        "while n > 0:  # Keep looping as long as n is greater than 0\n",
        "    factorial *= n  # Multiply the current factorial value by n\n",
        "    n -= 1  # Decrease n by 1 to multiply with the next smaller number\n",
        "\n",
        "print(factorial)  # Output the final result\n"
      ],
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      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "120\n"
          ]
        }
      ]
    }
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}