Add various Python mathematical and string utility programs

Programs/Test/BinaryToDecimal.py

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+#Author: OMKAR PATHAK
+#This program converts the given binary number to its decimal equivalent
+
+def binaryToDecimal(binary):
+    '''This function calculates the decimal equivalent to given binary number'''
+    binary1 = binary
+    decimal, i, n = 0, 0, 0
+    while(binary != 0):
+        dec = binary % 10
+        decimal = decimal + dec * pow(2, i)
+        binary = binary//10
+        i += 1
+    print('Decimal equivalent of {} is {}'.format(binary1, decimal))
+
+if __name__ == '__main__':
+    userInput = int(input('Enter the binary number to check its decimal equivalent: '))
+    binaryToDecimal(userInput)

Programs/Test/CharCount.py

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+#Author: OMKAR PATHAK
+#This program checks for the character frequency in the given string
+
+def charFrequency(userInput):
+    '''This fuction helps to count the char frequency in the given string '''
+    userInput = userInput.lower() #covert to lowercase
+    dict = {}
+    for char in userInput:
+        keys = dict.keys()
+        if char in keys:
+            dict[char] += 1
+        else:
+            dict[char] = 1
+    return dict
+
+if __name__ == '__main__':
+    userInput = str(input('Enter a string: '))
+    print(charFrequency(userInput))

Programs/Test/Factorial.py

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+#Author: OMKAR PATHAK
+#This program calculates the factorial of a given number
+
+def factorial(number):
+    '''This function calculates the factorial of a number'''
+    if number == 1 or number == 0:
+        return 1
+    else:
+        return number * factorial(number - 1)
+
+def factorial_without_recursion(number):
+    fact = 1
+    while(number > 0):
+        fact = fact * number
+        number = number - 1
+    print('Factorial of', number,'is: ')
+    print(fact)
+
+if __name__ == '__main__':
+    userInput = int(input('Enter the number to find its factorial: '))
+    print('Factorial of', userInput, 'is:', factorial(userInput))
+    factorial_without_recursion(userInput)

Programs/Test/Fibonacci.py

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+#Author: OMKAR PATHAK
+#This program calculates the fibonacci series till the n-th term
+
+def fibonacci(number):
+    '''This function calculates the fibonacci series till the n-th term'''
+    if number <= 1:
+        return number
+    else:
+        return (fibonacci(number - 1) + fibonacci(number - 2))
+
+def fibonacci_without_recursion(number):
+    if number == 0: return 0
+    fibonacci0, fibonacci1 = 0, 1
+    for i in range(2, number + 1):
+        fibonacci1, fibonacci0 = fibonacci0 + fibonacci1, fibonacci1
+    return fibonacci1
+
+if __name__ == '__main__':
+    userInput = int(input('Enter the number upto which you wish to calculate fibonnaci series: '))
+    for i in range(userInput + 1):
+        print(fibonacci(i),end=' ')
+
+    print("\nUsing LOOP:")
+    print(fibonacci_without_recursion(userInput))

Programs/Test/LCM.py

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+#Author: OMKAR PATHAK
+#This program calculates the LCM of the two numbers entered by the user
+
+def LCM(number1, number2):
+    '''This function calculates LCM of two numbers inputed by the user'''
+    maximum = max(number1, number2)
+    i = maximum
+    while True:
+        if (i % number1 == 0  and i % number2 == 0):
+            lcm = i
+            break
+        i += maximum
+
+    return lcm
+
+if __name__ == '__main__':
+    userInput1 = int(input('Enter first number: '))
+    userInput2 = int(input('Enter second number: '))
+    print('LCM of {} and {} is {}'.format( userInput1, userInput2, LCM(userInput1, userInput2)))

Programs/Test/PrimeNumber.py

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+#Author: OMKAR PATHAK
+#This program checks whether the entered number is prime or not
+
+def checkPrime(number):
+    '''This function checks for prime number'''
+    isPrime = False
+    if number == 2:
+        print(number, 'is a Prime Number')
+    if number > 1:
+        for i in range(2, number):
+            if number % i == 0:
+                print(number, 'is not a Prime Number')
+                isPrime = False
+                break
+            else:
+                isPrime = True
+
+        if isPrime:
+            print(number, 'is a Prime Number')
+
+if __name__ == '__main__':
+    userInput = int(input('Enter a number to check: '))
+    checkPrime(userInput)