Python program to find the roots of quadratic equation

from math import sqrt
a=float(input("Please enter first number: "))
b=float(input("Please enter second number: "))
c=float(input("Please enter third number: "))
d=b*b-4*a*c; # finding determinant 
if(d==0): # when d is 0 both the roots will be equal 
   print("\n roots are equal \n");
   root1=root2=-b/(2*a);
   print("root1=" ,root1, " root2=",root2,);
elif(d>0): # roots are real and distinct 
     print("\n roots are real and distinct \n");
     root1=(-b+sqrt(d))/(2*a);
     root2=(-b-sqrt(d))/(2*a);
     print("root1=" ,root1, " root2=",root2,);
 # when d is -ve it is not possible to take the squareroot of -ve number, we have to take absolute value of d 
else:
    print("\n roots are imaginary \n");
    root1=-b/(2*a);
    root2=sqrt(-d)/(2*a);
    print("real part= " ,root1, "imaginary part= " ,root2,);

    Output 1:
             Please enter first number: 2
             Please enter second number: 2
             Please enter third number: 2
              roots are imaginary 
             real part=  -0.5 imaginary part=  0.8660254037844386
    Output 2:
             Please enter first number: 2
             Please enter second number: 5
             Please enter third number: 1
              roots are real and distinct 
             root1= -0.21922359359558485  root2= -2.2807764064044154
    Output 3:
             Please enter first number: 1
             Please enter second number: 2
             Please enter third number: 1
              roots are equal 
             root1= -1.0  root2= -1.0

इन्हें भी देखें।

• while loop
• for loop
• nested loops
• loop control statements (Break, Continue, Pass)
• if statement
• if-else statement
• if-elif statement
• nested if statement
• range() function
• keywords
• Identifiers  (names)
• Literals
• Operators
• punctuatorts

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