関連ワード:  write a program in python    write a program in python to add two numbers    write a program in python to print fibonacci series    write a program in python to calculate the area of a circle    write a program in python to find factorial of a number    write a program in python to calculate simple interest    write a program in python to check prime number    write a program in python to swap two numbers    write a program in python to find area of rectangle    write a program in python to print hello world