Core Java[Session5]

1. Constants
2. 
   
3. Constant is a fixed value.
4. 
   
5. There are 3 types of constants.
6. 
   
7. i)character
8. ii)Numeric
9. iii)Boolean
10. 
    
11. 
    
12. 
    
13. character constants
14. -------------------
15. character constants are 
16. 
    
17. i)words.
18. ii)alphabets[a-z,A-Z].
19. iii)digits[0-9].
20. iv)special symbols.
21. 
    
22. character constants are of 2 types.
23. 
    
24. i)single character constants
25. ii)String constants.
26. 
    
27. i)single chracter constant
28. --------------------------
29. single character enclosed in single quotes is known as 
30. single character constant.
31. 
    
32. ex:
33.   'a'
34.   'x'
35.   '5'
36.   '*'
37.   ''
38.    '10'(ic)
39.    'abc'(ic)
40. 
    
41. String constants
42. ----------------
43. group of letters enclosed in double quotes is known as 
44. string constant.
45. 
    
46. ex:
47.    "satya"
48.    "satya123"
49.    ""
50.    " "
51.    "a"
52.    "12345"
53.    
54. 
    
55. Numeric constants
56. -----------------
57. All numbers are numeric constants
58. 
    
59. They are 2 types 
60. 
    
61. Integer constant
62. 
    
63. decimal/real/floating-point constant.
64. 
    
65. Integer constant
66. ----------------
67. Number without fractional part is called integer constant.
68. 
    
69. ex:
70. 10
71. 20 
72. 56
73. 
    
74. decimal constant.
75. -----------------
76. Number with fractional part is called decimal constant.
77. 
    
78. ex:10.7 
79. 5.6
80.