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   "source": [
    "### <center>San Jose State University<br>Department of Applied Data Science<br><br>**DATA 200<br>Computational Programming for Data Analytics**<br><br>Spring 2024<br>Instructor: Ron Mak</center>"
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   "source": [
    "# 3.7 `while` Statement"
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   "source": [
    "#### What is the first power of 3 that is **greater than or equal to 100**?"
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    "product = 3\n",
    "\n",
    "product = 3*product\n",
    "print(product)\n",
    "\n",
    "product = 3*product\n",
    "print(product)\n",
    "\n",
    "product = 3*product\n",
    "print(product)\n",
    "\n",
    "product = 3*product\n",
    "print(product)\n",
    "\n",
    "product = 3*product\n",
    "print(product)"
   ]
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   "metadata": {},
   "source": [
    "#### Instead of writing a group of statements over and over again, we can use a `while` loop with a suite of those statements."
   ]
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   "outputs": [],
   "source": [
    "product = 3\n",
    "\n",
    "while product <= 50:\n",
    "    product = 3*product\n",
    "    print(product)"
   ]
  },
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    "product"
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   "source": [
    "#### How does a `while` loop work? The computer first evaluates the condition. If the condition is true, the computer executes the suite. After each time it has completed executing the suite, the computer re-evaluates the condition. If the condition is still true, the computer executes the suite again. The computer continues to execute the loop **while the condition is true** each time it's re-evaluated. As soon as the condition evaluates to false, the computer leaves the loop.\n",
    "\n",
    "#### If the condition evaluates to false to begin with, the computer doesn't execute the suite at all."
   ]
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   "metadata": {},
   "source": [
    "#### **EXERCISE:** Write Python code that includes a `while` loop to compute the highest power of 3 that is **less than or equal to 1000**. Don't print the intermediate powers. Will the following work?"
   ]
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   "source": [
    "product = 3\n",
    "\n",
    "while product < 1000:\n",
    "    product = 3*product\n",
    "    #print(product)\n",
    "    \n",
    "    \n",
    "print(product)"
   ]
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   "execution_count": null,
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   "source": [
    "##########################################################################\n",
    "# (C) Copyright 2019 by Deitel & Associates, Inc. and                    #\n",
    "# Pearson Education, Inc. All Rights Reserved.                           #\n",
    "#                                                                        #\n",
    "# DISCLAIMER: The authors and publisher of this book have used their     #\n",
    "# best efforts in preparing the book. These efforts include the          #\n",
    "# development, research, and testing of the theories and programs        #\n",
    "# to determine their effectiveness. The authors and publisher make       #\n",
    "# no warranty of any kind, expressed or implied, with regard to these    #\n",
    "# programs or to the documentation contained in these books. The authors #\n",
    "# and publisher shall not be liable in any event for incidental or       #\n",
    "# consequential damages in connection with, or arising out of, the       #\n",
    "# furnishing, performance, or use of these programs.                     #\n",
    "##########################################################################\n"
   ]
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  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Additional material (C) Copyright 2023 by Ronald Mak"
   ]
  }
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