Page 115 - Computer Science V2.0 Class 11

Example: Write a pseudocode and draw the flowchart to compute the factorial of a number.
Input:
num: the number whose factorial is required

Process:
Compute the product of numbers 1 to num.
Output:
Product as the factorial of given number
input num
product = 1
for i = 1 to num
product = product * i
end-for
Print product
The flowchart of the above pseudocode is as follows (Fig 4.12):

Start

input num

product = 1

i = 1

False
i< = num

True

product = product*i

i = i + 1

print product

Stop

Fig 4.12: Flowchart to compute the factorial of a number
Finally, suppose you are required to find the average marks of students in a class. The marks obtained by different
students are entered by the user one by one, and the end of the input is indicated by entering a negative integer.

Problem Solving 101