Most Important program list

1. Factorial by Recursion
2. Fibonacci by Recursion
3. Reverse by Recursion
4. Sum of digit by Recursion
5. GCD by Recursion
6. Matrix Multiplication
7. Matrix Transpose
8. Sum of two Matrix
9. Insertion Sort
10. Selection Sort
11. Bubble Sort
12. Binary Search
13. Linear Search in Array
14. Minimum value of Array
15. Maximum value of Array
16. Sum of Array
17. Swap two values without using third variable
18. Sum of two numbers
19. Swap values of two Variables
20. Find largest value among three variable - conditional operator
21. Largest value among three variables
22. Largest among 3 variables using nested if
23. Largest value of two variables - Conditional Operator
24. Find larger value between two variable
25. Swap values of two variables using XOR
26. Even Odd Number
27. Even Odd Number series up to nth position
28. Leap Year
29. Sort array of 10 strings
30. Locate a word in String - STRSTR
31. Locate a character in String - STRCHR
32. String Concatenation - STRCAT
33. String Reverse - STRREV
34. String Compare Ignore Case - STRICMP
35. String Compare - STRCMP
36. Toggle case of string
37. String to lower case - STRLWR
38. String to Upper Case - STRUPR
39. String Length - STRLEN
40. Pascal Triangle
41. Armstrong Numbers upto N
42. Armstrong Number
43. Compound Interest
44. Prime Number 
45. Fibonacci Series
46. Sum of digits
47. Reverse Number
48. Power
49. Factorial
50. Print 1 to 10
51. Palindrome number using for loop
52. Palindrome number using while loop
53. Prime number using for loop
54. Prime Number using while loop
55. Fibonacci series using for loop
56. Fibonacci Series using while loop
57. Reverse number using for loop
58. Reverse number using while loop
59. Sum of digits using for loop
60. Alphabet Patterns
61. Series Program
62. Number Patterns
63. Star Patterns
64. File Copy using command line arguments
65. File to upper case using command line arguments
66. Count characters of file
67. Write to text file
68. Read text file
69. Binary by recursion
70. Towers of Hanoi by recursion
71. Convert feet to meter
72. Convert farenheit to celcius
73. Calculate Simple Interest
74. Convert Km to Meter, Centimeter or Millimeter