Write a sample program to perform

>>>

Enter real and imaginary part of complex No - 1

3 4

Enter real and imaginary part of complex No - 2

2 3

Addition: 5.00+7.00i

Subtraction: 1.00+1.00i

Multiplication: -6.00+17.00i

Division: 1.38-0.08i

Modulas of complex Number A: 5.0

Python provides ability to override inbuilt arithmetic methods like __add__(),__sub__(), etc methods. It is similar to overriding __str__() method to print formatted output(like we have done in above code).For more detail refer this.

a + b

the __add__ method of the a object is called: a.__add__(b)

it means that we can control the result of a sum of two objects by modifying or defining our own __add__ method.

**Addition(+), Subtraction(-), Multiplication(*),Division(/)**between complex numbers. And also perform**Mod**(underRoot(Square(real)+square(imaginary))) of complex number.from math import pow class complex: def __init__(self, real, imag): self.real = real self.imag = imag def __add__(self, other): return complex(self.real+other.real, self.imag+other.imag) def __sub__(self, other): return complex(self.real-other.real, self.imag-other.imag) def __mul__(self, other): return complex(self.real*other.real-self.imag*other.imag, self.real*other.imag+self.imag*other.real) def __div__(self, other): try: return self.__mul__(complex(other.real, -1*other.imag)).__mul__(complex(1.0/(other.mod().real)**2, 0)) except Exception as e: print e return None def mod(self): return pow(self.real**2+self.imag**2, 0.5) def __str__(self, precision=2): return str(("%."+"%df"%precision)%float(self.real))+('+' if self.imag>=0 else '-')+str(("%."+"%df"%precision)%float(abs(self.imag)))+'i' print "Enter real and imaginary part of complex No - 1(separeated by space)" A = complex(*map(float, raw_input().strip().split())) print "Enter real and imaginary part of complex No - 2(separeated by space)" B = complex(*map(float, raw_input().strip().split())) print "Addition: " + str(A+B) print "Subtraction: " + str(A-B) print "Multiplication: " + str(A*B) print "Division: "+ str(A/B) print "Modulas of complex Number A: " + str(A.mod())

**Sample output**:->>>

Enter real and imaginary part of complex No - 1

3 4

Enter real and imaginary part of complex No - 2

2 3

Addition: 5.00+7.00i

Subtraction: 1.00+1.00i

Multiplication: -6.00+17.00i

Division: 1.38-0.08i

Modulas of complex Number A: 5.0

**Explanation**:-Python provides ability to override inbuilt arithmetic methods like __add__(),__sub__(), etc methods. It is similar to overriding __str__() method to print formatted output(like we have done in above code).For more detail refer this.

**What happens internally when we perform + operation between two objects(Remember primitive integer is object in python)?**- When we sum two objects in Python, likea + b

the __add__ method of the a object is called: a.__add__(b)

it means that we can control the result of a sum of two objects by modifying or defining our own __add__ method.

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