{
"metadata": {
"name": "Chapter VI"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 6: Making decisions"
]
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.1, Page number: 66"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"number=12 #number=int(raw_input(\"Type in your number: \"))\n",
"\n",
"try:\n",
" if( number < 0 ):\n",
" number=-number #change sign,if number is negative\n",
"except: \n",
" print \"not a number\" #Invalid input/value error\n",
" \n",
"print (\"The absolute Value is {0}\".format(number))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The absolute Value is 12\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.2, Page number: 67"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"gradeTotal=0\n",
"failureCount=0\n",
"i=0\n",
"\n",
"numberOfGrades=5 #numberOfGrades=int(raw_input(\"How many grades will you be entering? \"))\n",
"grade=[72,83,91,89,95]\n",
"\n",
"while(i<numberOfGrades):\n",
" gradeTotal=gradeTotal+grade[i]\n",
" if(grade<65):\n",
" failureCount=failureCount+1;\n",
" i=i+1\n",
"\n",
"average=float(gradeTotal/numberOfGrades)\n",
" \n",
"print(\"Grade average= {0:.2f}\".format(average))\n",
"print(\"Number of failures= {0}\".format(failureCount))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Grade average= 86.00\n",
"Number of failures= 0\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.3, Page number: 70"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"number_to_test=30 #number_to_test=int(raw_input(\"Enter your number to be tested: \"))\n",
"\n",
"remainder=number_to_test%2\n",
"\n",
"if(remainder==0):\n",
" print(\"The number is even\")\n",
"if(remainder!=0):\n",
" print(\"The number is odd\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The number is even\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.4, Page number: 71"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"number_to_test=45 #number_to_test=int(raw_input(\"Enter your Number to be tested: \"))\n",
"\n",
"remainder=number_to_test%2\n",
"\n",
"if(remainder==0):\n",
" print(\"The number is even.\\n\")\n",
"else: #using 'else' instead of second 'if'\n",
" print(\"The number is odd.\\n\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The number is odd.\n",
"\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.5, Page number: 73"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"year=1900 #year=int(raw_input(\"Enter the year to be tested: \"))\n",
"\n",
"rem_4=year%4\n",
"rem_100=year%100\n",
"rem_400=year%400\n",
"\n",
"if((rem_4==0 and rem_100!=0)or rem_400==0):\n",
" print(\"It's a leap year.\")\n",
"else:\n",
" print(\"Nope, it's not a leap year.\\n\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Nope, it's not a leap year.\n",
"\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.6, Page number: 77"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"number=450 #number=int(raw_input(\"Please type in a number: \"))\n",
"\n",
"try:\n",
" if(number<0): #Negative Number\n",
" sign=-1\n",
" elif(number==0): #No sign\n",
" sign=0\n",
" else: #Positive Number\n",
" sign=1\n",
"except: #Value error\n",
" print(\"invalid input\")\n",
"\n",
"print(\"Sign= {0}\".format(sign))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Sign= 1\n"
]
}
],
"prompt_number": 11
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.7, Page number: 78"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"ch='z' #ch=raw_input(\"Enter a single character: \")\n",
"\n",
"if((ch>='a' and ch <='z') or (ch>='A' and ch<='Z')):\n",
" print(\"It's an alphabetic character.\")\n",
"elif(ch>='0'and ch<='9'):\n",
" print(\"It's a digit.\")\n",
"else:\n",
" print(\"It's a special character\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"It's an alphabetic character.\n"
]
}
],
"prompt_number": 13
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.8, Page number: 80"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"try:\n",
" print(\"Type in your expression(with spaces inbetween): \")\n",
" value1, operator, value2=\"5 + 2\".split()\n",
" #value1, operator, value2=raw_input().split()\n",
"\n",
"except:\n",
" print(\"err.. follow the syntax <value operator value>\") \n",
" print(\"with spaces inbetween\\n\")\n",
"\n",
"value1,value2=[float(value1),float(value2)]\n",
"\n",
"if(operator=='+'):\n",
" print(\"answer: {0:.2f}\".format(value1+value2))\n",
"elif(operator=='-'):\n",
" print(\"answer: {0:.2f}\".format(value1-value2))\n",
"elif(operator=='*'):\n",
" print(\"answer: {0:.2f}\".format(value1*value2))\n",
"else:\n",
" print(\"answer: {0:.2f}\".format(value1/value2))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Type in your expression(with spaces inbetween): \n",
"answer: 7.00\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.9, Page number: 85"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"\n",
"try:\n",
" print(\"Type in your expression(with spaces inbetween): \")\n",
" value1, operator, value2=\"3 * 5\".split()\n",
" #value1, operator, value2=raw_input().split()\n",
" \n",
" \n",
"except:\n",
" print(\"err.. follow the syntax <value operator value>\") \n",
" print(\"with spaces inbetween\\n\")\n",
"\n",
"value1,value2=[float(value1), float(value2)]\n",
"\n",
"if(operator=='+'):\n",
" print(\"Answer= {0:.2f}\".format(value1+value2))\n",
"elif(operator=='-'):\n",
" print(\"Answer= {0:.2f}\".format(value1-value2))\n",
"elif(operator=='*'):\n",
" print(\"Answer= {0:.2f}\".format(value1*value2))\n",
"elif(operator=='/'):\n",
" if(value2==0):\n",
" print(\"Whoops! divide by 0 issue\")\n",
" else:\n",
" print(\"Answer= {0:.2f}\".format(value1/value2))\n",
"else:\n",
" print(\"err.. Invalid operator\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Type in your expression(with spaces inbetween): \n",
"Answer= 15.00\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 6.10, Page number: 87"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"p=2\n",
"\n",
"while(p<=50): #Outer loop\n",
" isPrime=1 #Variable declaration\n",
" d=2 \n",
" while(d<p): #Inner loop\n",
" if(p%d==0):\n",
" isPrime=0\n",
" d=d+1 #End of inner loop\n",
" \n",
" if( isPrime!=0):\n",
" print \" \",p \n",
" p=p+1 #End of outer loop"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
" 2\n",
" 3\n",
" 5\n",
" 7\n",
" 11\n",
" 13\n",
" 17\n",
" 19\n",
" 23\n",
" 29\n",
" 31\n",
" 37\n",
" 41\n",
" 43\n",
" 47\n"
]
}
],
"prompt_number": 14
}
],
"metadata": {}
}
]
}