Algorithm

Write an algorithm to add two numbers entered by user.

Step 1: Start

Step 2: Declare variables num1, num2 and sum.

Step 3: Read values num1 and num2.

Step 4: Add num1 and num2 and assign the result to sum.

        sum←num1+num2

Step 5: Display sum

Step 6: Stop

Write an algorithm to find the largest among three different numbers entered by user.

Step 1: Start

Step 2: Declare variables a,b and c.

Step 3: Read variables a,b and c.

Step 4: If a>b

           If a>c

              Display a is the largest number.

           Else

              Display c is the largest number.

        Else

           If b>c

              Display b is the largest number.

           Else

              Display c is the greatest number. 

Step 5: Stop

Write an algorithm to find the factorial of a number entered by user.

Step 1: Start

Step 2: Declare variables n,factorial and i.

Step 3: Initialize variables

          factorial←1

          i←1

Step 4: Read value of n

Step 5: Repeat the steps until i=n

     5.1: factorial←factorial*i

     5.2: i←i+1

Step 6: Display factorial

Step 7: Stop

Write an algorithm to find all roots of a quadratic equation ax2+bx+c=0.

Step 1: Start

Step 2: Declare variables a, b, c, D, x1, x2, rp and ip;

Step 3: Calculate discriminant

         D←b2-4ac

Step 4: If D≥0

              r1←(-b+√D)/2a

              r2←(-b-√D)/2a

              Display r1 and r2 as roots.

        Else    

              Calculate real part and imaginary part

              rp←b/2a

              ip←√(-D)/2a

              Display rp+j(ip) and rp-j(ip) as roots

Step 5: Stop