1. Write a C++ program to print “Hello World”.
     2. Write a C++ program to add two numbers.
     3. Write a C++ program to multiply two float numbers.
     4. Write a C++ program to perform arithmetic operation ( +, -, *, / ) on two integer number.
     5. The distance between two cities (in km.) is input through the keyboard. 
        Write a C++ program to convert and print this distance in meters, feet, inches and centimetres.
     6. Write a C++ program to calculate the area and circumference of the circle.
     7. Write a C++ program to interchange the value of two variables using third variable.
     8. Write a C++ program to interchange the value of two variables without using third variable.
     9. Write a C++ program to calculate simple interest.
    10. Write a C++ program to check whether input number is positive or negative.
    11. Write a C++ program to check whether input number is even or odd.
    12. Any year is input through the keyboard.
        Write a C++ program to determine whether the year is a leap year or not.
    13. Write a C++ program to find maximum of two numbers.
    14. Write a C++ program to find maximum of three numbers using nested if-else.
    15. Any character is entered through the keyboard,
        write a C++ program to determine whether the character entered is a capital letter, 
        a small case letter, a digit or a special symbol.
    16. Write a C++ program to print table of any number.
    17. Write a C++ program to find the factorial value of any number entered through the keyboard.
    18. Two numbers are entered through the keyboard. 
        Write a C++ program to find the value of one number raised to the power of another.
    19. If a number is input through the keyboard, write a C++ program to calculate the sum of its digits.
    20. If a number is input through the keyboard, write a C++ program to reverse the number.
    21. Write a C++ program to calculate sum of first n numbers.
    22. Write a C++ program to calculate sum of given n numbers.
    23. Write a C++ program to determine whether a number is prime or not.
        A prime number is one, which is divisible only by 1 or itself.
    24. Write a C++ program to print out all Armstrong numbers between 1 and 500. 
        If sum of cubes of each digit of the number is equal to the number itself, 
        then the number is called an Armstrong number.
    25. Write a C++ program to determine whether a number is palindrome or not.
    26. Write a C++ program to find the binary equivalent of the entered number.
    27. Write a C++ program to add first seven terms of the following series:
        1/ 1!+2/2!+3/3!+ .............
    28. Write a C++ program to calculate the value of sine series.
    29. Write a C++ program to calculate the value of cosine series.
    30. Write a C++ program to find nCr factor of given number.
    31. Write a C++ program to print all factors of a number.
    32. Write a C++ program to print Fibonacci sequence. In a Fibonacci sequence the sum 
        of two successive terms gives the third term. Following are the first few terms of 
        the Fibonacci sequence: 
        0 1 1 2 3 5 8 13 21 34 55 89.....
    33. Write a C++ program to print following pattern:
           *
           **
           ***
           ****
           *****
   34. Write a C++ program to print following pattern:
           1
           2 3
           4 5 6
           7 8 9 10
  35. Write a C++ program to print Pascal triangle.
  36. Write a menu driven program which has following options: 
      1. Factorial of a number. 
      2. Prime or not 
      3. Odd or even 
      4. Exit 
  37. Write a C++ program to find GCD of two numbers.
  38. Write a C++ program to calculate area of circle using call by value.
  39. Write a C++ program for swapping two numbers using call by reference.
  40. Write a C++ program to calculate the factorial of a number using recursion.

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