{
"metadata": {
"name": "",
"signature": "sha256:7be64d50608515e43ddcf6d9a0311be1c6e260d1acc2eec7e9577015cf19d4da"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 6: Loops"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example square.c, Page 102"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"def main():\n",
" print \"This program prints a table of squares.\"\n",
" n=int(raw_input(\"Enter number of entries in table: \")) #input number of entries\n",
" i=1 #variable declaration\n",
" while(i<=n):\n",
" print \"%10d%10d\" % (i,i * i) #printing number and it's square\n",
" i=i+1\n",
"if __name__=='__main__':\n",
" main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"This program prints a table of squares.\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter number of entries in table: 5\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" 1 1\n",
" 2 4\n",
" 3 9\n",
" 4 16\n",
" 5 25\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example sum.c, Page 103"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"def main():\n",
" sum=0\n",
" print \"This program sums a series of integers.\"\n",
" n=int(raw_input(\"Enter integers (0 to terminate): \")) #input the integers to operate on\n",
" while(n!=0):\n",
" sum=sum+n #calculating sum till 0 encountered\n",
" n=input()\n",
" print \"The sum is: %d\" % sum #printing sum\n",
"if __name__=='__main__':\n",
" main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"This program sums a series of integers.\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter integers (0 to terminate): 8\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"23\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"71\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"5\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"0\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The sum is: 107\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example numdigits.c, Page 105"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"def main():\n",
" digits=0 #initialise\n",
" n=int(raw_input(\"Enter a nonnegative integer: \")) #input the number\n",
" n=n/10\n",
" digits=digits+1\n",
" #finding number of digits\n",
" while(n>0):\n",
" n=n/10\n",
" digits=digits+1\n",
" print \"The number has %d digit(s).\" % digits #printing answer\n",
"\n",
"if __name__=='__main__':\n",
" main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter a nonnegative integer: 60\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The number has 2 digit(s).\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example square2.c, Page 110"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"def main():\n",
" print \"This program prints a table of squares.\" \n",
" n=int(raw_input(\"Enter number of entries in table: \")) #input number of entries\n",
" for i in range (1,(n+1)):\n",
" print \"%10d%10d\" % (i,i * i) #printing number and it's square\n",
" \n",
"if __name__=='__main__':\n",
" main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"This program prints a table of squares.\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter number of entries in table: 5\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" 1 1\n",
" 2 4\n",
" 3 9\n",
" 4 16\n",
" 5 25\n"
]
}
],
"prompt_number": 12
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example square3.c,Page 110"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"def main():\n",
" print \"This program prints a table of squares.\" \n",
" n=int(raw_input(\"Enter number of entries in table: \")) #input number of entries\n",
" \n",
" #variable declaration\n",
" i=1\n",
" odd=3\n",
" square=1\n",
" #calculation\n",
" for i in range (1,(n+1)):\n",
" print \"%10d%10d\" % (i,square)\n",
" square=square+odd \n",
" odd=odd+2\n",
" \n",
"if __name__=='__main__':\n",
" main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"This program prints a table of squares.\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter number of entries in table: 5\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" 1 1\n",
" 2 4\n",
" 3 9\n",
" 4 16\n",
" 5 25\n"
]
}
],
"prompt_number": 14
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example checking.c, Page 115"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"def main():\n",
" balance=0.0 #initialise\n",
" print \"*** ACME checkbook-balancing program ***\"\n",
" print \"Commands: 0=clear, 1=credits, 2=debit, 3=balance, 4=exit\"\n",
" print \"\"\n",
" while(1):\n",
" cmd=int(raw_input(\"Enter command: \")) \n",
" \n",
" #operate on balance according to the option selected\n",
" if cmd==0:\n",
" balance=0.0 #clear balance\n",
" elif cmd==1:\n",
" credit=float(raw_input(\"Enter amount of credit: \"))\n",
" balance=balance+credit #credit\n",
" elif cmd==2:\n",
" debit=float(raw_input(\"Enter amount of debit: \"))\n",
" balance=balance-debit #debit\n",
" elif cmd==3:\n",
" print \"Current balance: $%0.2f\" % balance #show current balance\n",
" elif cmd==4:\n",
" return 0 #exit\n",
" else:\n",
" print \"Commands: 0=clear, 1=credits, 2=debit, 3=balance, 4=exit\" \n",
" \n",
" \n",
"if __name__=='__main__':\n",
" main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"*** ACME checkbook-balancing program ***\n",
"Commands: 0=clear, 1=credits, 2=debit, 3=balance, 4=exit\n",
"\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 1\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter amount of credit: 1042.56\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter amount of debit: 133.79\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 1\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter amount of credit: 1754.32\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter amount of debit: 1400\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter amount of debit: 68\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter amount of debit: 50\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 3\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Current balance: $1145.09\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter command: 4\n"
]
}
],
"prompt_number": 17
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}