Chapter 6 : Iteration

example 6.1 page no :56

In [1]:
'''
example 6.1 page no :56
'''

def countdown (n):
    while (n > 0):
        print n
        n = n-1
    print "Blastoff!"
    return 0
    
countdown(5)  

5
4
3
2
1
Blastoff!
Out[1]:
0

example 6.2 page no :57

In [2]:
'''
example 6.2 page no :57
'''

def sequence (n):
    while (n != 1):
        print n
        if (n%2 == 0):
            n = n / 2
        else:
            n = n*3 + 1
            
sequence(10)

10
5
16
8
4
2

example 6.3 page no :58

In [3]:
'''
example 6.3 page no :58
'''
import math
x = 1.0
while (x < 10.0):
    print x , "\t" , math.log(x)
    x = x + 1.0

1.0 	0.0
2.0 	0.69314718056
3.0 	1.09861228867
4.0 	1.38629436112
5.0 	1.60943791243
6.0 	1.79175946923
7.0 	1.94591014906
8.0 	2.07944154168
9.0 	2.19722457734

example 6.4 page no :59

In [4]:
'''
example 6.4 page no :59
'''
import math
x = 1.0
while (x < 10.0):
    print x , "\t" , math.log(x) / math.log(2.0) 
    x = x + 1.0

1.0 	0.0
2.0 	1.0
3.0 	1.58496250072
4.0 	2.0
5.0 	2.32192809489
6.0 	2.58496250072
7.0 	2.80735492206
8.0 	3.0
9.0 	3.16992500144

example 6.5 page no :59

In [5]:
'''
example 6.5 page no :59
'''
import math
x = 1.0;
while (x < 100.0):
    print x , "\t" , math.log(x) / math.log(2.0)
    x = x * 2.0

1.0 	0.0
2.0 	1.0
4.0 	2.0
8.0 	3.0
16.0 	4.0
32.0 	5.0
64.0 	6.0

example 6.6 page no: 60

In [6]:
'''
example 6.6 page no: 60
'''

i = 1;
while (i <= 6):
    print 2*i ,
    i = i + 1;

2 4 6 8 10 12

example 6.7 page no:60

In [7]:
'''
example 6.7 page no:60
'''

def printMultiples (n):
    i = 1
    while (i <= 6):
        print n*i,
        i = i + 1;
        
printMultiples(3)        

3 6 9 12 15 18

example 6.8 page no:61

In [8]:
'''
example 6.8 page no:61
'''


def printMultiples (n):
    i = 1
    while (i <= 6):
        print n*i,
        i = i + 1;
    print ''        

i = 1;
while (i <= 6):
    printMultiples (i);
    i = i + 1;

1 2 3 4 5 6 
2 4 6 8 10 12 
3 6 9 12 15 18 
4 8 12 16 20 24 
5 10 15 20 25 30 
6 12 18 24 30 36

example 6.9 page no: 62

In [9]:
'''
example 6.9 page no: 62
'''

def printMultiples (n):
    i = 1
    while (i <= 6):
        print n*i,
        i = i + 1;
    print ''        

def printMultTable ():
    i = 1;
    while (i <= 6):
        printMultiples (i)
        i = i + 1

printMultTable()

1 2 3 4 5 6 
2 4 6 8 10 12 
3 6 9 12 15 18 
4 8 12 16 20 24 
5 10 15 20 25 30 
6 12 18 24 30 36

example 6.10 page no :63

In [10]:
'''
example 6.10 page no :63
'''

def printMultiples (n):
    i = 1
    while (i <= 6):
        print n*i,
        i = i + 1;
    print ''        

def printMultTable (high):
    i = 1;
    while (i <= high):
        printMultiples (i);
        i = i + 1;
        
printMultTable(4)        

1 2 3 4 5 6 
2 4 6 8 10 12 
3 6 9 12 15 18 
4 8 12 16 20 24

example 6.11 page no :64

In [11]:
'''
example 6.11 page no :64
'''

def printMultiples(n,high):
    i = 1;
    while (i <= high):
        print n*i ,
        i = i + 1;
    print ''

def printMultTable (high):
    i = 1;  
    while (i <= high):
        printMultiples (i, high)
        i = i + 1;

printMultTable(5)        

1 2 3 4 5 
2 4 6 8 10 
3 6 9 12 15 
4 8 12 16 20 
5 10 15 20 25
In [ ]: