Python program for Simple Calculator

Python program to demonstrate simple calculator.

print("=== Python Simple Calculator ===")

print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")

choice = input("\nEnter your choice: \n")

num1 = int(input("Enter number 1: "))
num2 = int(input("Enter number 2: "))

print("\nAnswer for Given Inputs:")

if choice == '1':
   print(num1, "+", num2, "=", num1 + num2)

elif choice == '2':
   print(num1, "-", num2, "=", num1 - num2)

elif choice == '3':
   print(num1, "*", num2,"=", num1*num2)

elif choice == '4':
   print(num1, "/", num2, "=", num1/num2)
else:
   print("Invalid input.")

Output of program

=== Python Simple Calculator ===
1. Addition
2. Subtraction
3. Multiplication
4. Division

Enter your choice: 
1
Enter number 1: 5
Enter number 2: 6

Answer for Given Inputs:
5 + 6 = 11

Python String Methods ( Functions )

Popular Python String Methods ( Functions )

        Method         Description

1. count() It returns the number of times a specified value occurs in a string
2. capitalize() It converts the first character of a string into upper case
3. casefold()   Converts string into lower case
4. endswith() Returns true if the string ends with the specified value
5. find() Searches the string for a specified value and returns the position of where it was found
6. index() Searches the string for a specified value and returns the position of where it was found
7. isdigit()        Returns True if all characters in the string are digits
8. islower()      Returns True if all characters in the string are lower case
9. isalnum()     Returns True if all characters in the string are alphanumeric
10. isalpha()      Returns True if all characters in the string are in the alphabet
11. isdecimal() Returns True if all characters in the string are decimals
12. isspace()      Returns True if all characters in the string are whitespaces
13. istitle()        Returns True if the string follows the rules of a title
14. isupper()      Returns True if all characters in the string are upper case
15. join() Joins the elements of an iterable to the end of the string
16. ljust() Returns a left justified version of the string
17. lower() Converts a string into lower case
18. upper() Converts a string into upper case
19. lstrip()         Returns a left trim version of the string
20. replace()      Returns a string where a specified value is replaced with a specified value
21. rsplit()         Splits the string at the specified separator, and returns a list
22. rstrip()         Returns a right trim version of the string
23. startswith() Returns true if the string starts with the specified value
24. swapcase() Swaps cases, lower case becomes upper case and vice versa
25. title() Converts the first character of each word to upper case
26. strip() Returns a trimmed version of the string