{
"metadata": {
"name": "Chapter VII"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 7: Working with arrays"
]
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.1, Page number: 99"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"values=[0]*10\n",
"\n",
"values[0]=197\n",
"values[2]=-100\n",
"values[5]=350\n",
"values[3]=values[0]+values[5]\n",
"values[9]=values[5]/10\n",
"values[2]-=1\n",
"i=0\n",
"\n",
"for index in values:\n",
" print(\"values[{0}] = {1}\".format(i,index))\n",
" i=i+1"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"values[0] = 197\n",
"values[1] = 0\n",
"values[2] = -101\n",
"values[3] = 547\n",
"values[4] = 0\n",
"values[5] = 350\n",
"values[6] = 0\n",
"values[7] = 0\n",
"values[8] = 0\n",
"values[9] = 35\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.2, Page number: 101"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"ratingCounters=[0]*11\n",
"\n",
"for i in range(1,11):\n",
" ratingCounters[i]=0\n",
"\n",
"print(\"Enter your Responses:\")\n",
"\n",
"for i in range (1,21):\n",
" response=5 #score=5 for all iterations\n",
" #response=input()\n",
"\n",
" if(response<1 or response>10):\n",
" print(\"Bad response: {0}\".format(response))\n",
" else:\n",
" ratingCounters[response]+=1\n",
"\n",
"print(\"\\n\\n Rating | Number of Responses\\n\")\n",
"print(\" ----- -------------------\")\n",
"\n",
"for i in range(1,11):\n",
" print(\" {0} {1}\".format(i,ratingCounters[i]))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter your Responses:\n",
"\n",
"\n",
" Rating | Number of Responses\n",
"\n",
" ----- -------------------\n",
" 1 0\n",
" 2 0\n",
" 3 0\n",
" 4 0\n",
" 5 20\n",
" 6 0\n",
" 7 0\n",
" 8 0\n",
" 9 0\n",
" 10 0\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.3, Page number: 103"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Fibonacci=[0]*15\n",
"\n",
"Fibonacci[0]=0\n",
"Fibonacci[1]=1\n",
"\n",
"for i in range(2,15):\n",
" Fibonacci[i]=Fibonacci[i-2]+Fibonacci[i-1] #Calculation\n",
"\n",
"for i in range(15):\n",
" print(\"{0}\".format(Fibonacci[i])) #Print Result"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"0\n",
"1\n",
"1\n",
"2\n",
"3\n",
"5\n",
"8\n",
"13\n",
"21\n",
"34\n",
"55\n",
"89\n",
"144\n",
"233\n",
"377\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.4, Page number: 105"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"primeIndex=2\n",
"primes=[0]*50\n",
"\n",
"primes[0]=2\n",
"primes[1]=3\n",
"p=5\n",
"\n",
"while(p<=50): #Outer Loop-1\n",
" isPrime=True\n",
" \n",
" i=1\n",
" while(isPrime and p/primes[i]>=primes[i]): #Inner Loop\n",
" if(p%primes[i]==0):\n",
" isPrime=False\n",
" i+=1\n",
" \n",
"\n",
" if(isPrime==True):\n",
" primes[primeIndex]=p\n",
" primeIndex+=1\n",
" p=p+2\n",
"\n",
"for i in range (primeIndex): #Outer Loop-2\n",
" print(\"{0}\".format(primes[i]))"
],
"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": 3
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.5, Page number: 107"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"array_values=[0]*10\n",
"array_values[0:4]=[0,1,4,9,16]\n",
"\n",
"for i in range(5,10):\n",
" array_values[i]=i*i\n",
"\n",
"for i in range(10):\n",
" print(\"array values[{0}] = {1}\".format(i,array_values[i]))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"array values[0] = 0\n",
"array values[1] = 1\n",
"array values[2] = 4\n",
"array values[3] = 9\n",
"array values[4] = 16\n",
"array values[5] = 25\n",
"array values[6] = 36\n",
"array values[7] = 49\n",
"array values[8] = 64\n",
"array values[9] = 81\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.6, Page number: 108"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"import sys #For sys.stdout.write()\n",
"\n",
"word=['H','e','l','l','o','!']\n",
"\n",
"for i in word:\n",
" sys.stdout.write(\"{0} \".format(i))\n",
"print(\"\\n\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"H e l l o ! \n",
"\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.7, Page number: 110"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"import sys #for sys.stdout.write()\n",
"\n",
"baseDigits=['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F']\n",
"convertedNumber=[0]*10\n",
"index=0\n",
"\n",
"numberToConvert=234 #numberToConvert=input(\"Number to be converted?: \")\n",
"base=2 #base=input(\"Base?: \")\n",
"\n",
"while True:\n",
" convertedNumber[index]=numberToConvert%base\n",
" index+=1\n",
" numberToConvert=numberToConvert/base\n",
" if(numberToConvert==0):\n",
" break\n",
"\n",
"print(\"Converted Number= \")\n",
"index-=1\n",
"while(index>=0):\n",
" nextDigit=convertedNumber[index]\n",
" sys.stdout.write(\"{0} \".format(baseDigits[nextDigit]))\n",
" index-=1\n",
"\n",
"print(\"\\n\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Converted Number= \n",
"1 1 1 0 1 0 1 0 \n",
"\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Program 7.8, Page number: 116"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"import sys #For sys.exit() \n",
" \n",
"numFibs=18 #numFibs=input(\"How many Fibonacci numbers do you want (between 1 and 75)? \")\n",
"\n",
"if(numFibs<1 or numFibs>75):\n",
" print(\"bad number,sorry!\")\n",
" sys.exit()\n",
"\n",
"Fibonacci=[0]*numFibs\n",
"Fibonacci[0]=0\n",
"Fibonacci[1]=1\n",
"\n",
"for i in range(2,numFibs):\n",
" Fibonacci[i]=Fibonacci[i-2]+Fibonacci[i-1] \n",
" \n",
"for i in range(numFibs):\n",
" print(\"{0}\".format(Fibonacci[i]))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"0\n",
"1\n",
"1\n",
"2\n",
"3\n",
"5\n",
"8\n",
"13\n",
"21\n",
"34\n",
"55\n",
"89\n",
"144\n",
"233\n",
"377\n",
"610\n",
"987\n",
"1597\n"
]
}
],
"prompt_number": 7
}
],
"metadata": {}
}
]
}