Page 222 - Computer Science Class 11 Without Functions
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9.6.2 Multiplication Tables
Students in elementary classes are often required to memorise the multiplication tables. Suppose you need to
help your sister with memorising the multiplication tables. To help her, you need to know up to which number
(upperLimit) she needs the multiplication tables. For example, in the following table, the upper limit is 15.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
3 6 9 12 15 18 21 24 27 30 33 36 39 42 45
4 8 12 16 20 24 28 32 36 40 44 48 52 56 60
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75
6 12 18 24 30 36 42 48 54 60 66 72 78 84 90
7 14 21 28 35 42 49 56 63 70 77 84 91 98 105
8 16 24 32 40 48 56 64 72 80 88 96 104 112 120
9 18 27 36 45 54 63 72 81 90 99 108 117 126 135
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Now let us develop a program that takes upperLimit as an input and prints the multiplication tables. The
multiplication table has 10 rows. The ith row has an ith multiple of each number in the range range (upperLimit+1).
So, the outer loop would run for each row, and the inner loop would run for column (col), and print i*col (see
Program 9.10). To make the table nice looking, we print each number using three column positions and use the
specification '{0:3}'.format(i*col) for printing. The statement print('{0:3}'.format(i * col),
end=' ') prints the product of i and col formatted to take up at least 3 characters (including digits and spaces). The
end=' ' parameter ensures that the values are separated by a space rather than a newline character. The numbers in
each row are separated by a blank. Once a row is complete, we transfer the print control to the next line by executing
a print statement (line 7). For details, please see Program 9.10.
Program 9.10 To print multiplication tables
01 upperLimit = int(input('Enter the upper limit: '))
02
03 print('Multiplication Tables for ', 1, 'to', upperLimit)
04
05 for i in range(1, 11):
06 for col in range(1, upperLimit+1):
07 print('{0:3}'.format(i*col), end=' ')
08 print()
Make appropriate changes in the Program 9.10 to print multiplication tables of numbers from lowerLimit up
to a upperLimit, provided as input by the user. For example, for the numbers 3 and 6 provided as input for
lowerLimit and upperLimit, the program should yield the following output:
Multiplication Tables for 3 to 6
3 4 5 6
6 8 10 12
9 12 15 18
12 16 20 24
15 20 25 30
18 24 30 36
21 28 35 42
24 32 40 48
27 36 45 54
30 40 50 60
220 Touchpad Computer Science-XI

