Constants, Variables and Keywords- part 5.<\/p>\n
[fvplayer id=”98″]<\/p>\n
Constants are fixed values that do not change during the execution of a program. They can be of various types, like integer constants, floating-point constants, character constants, and string constants.<\/p>\n
5, -10, 100<\/code><\/li>\n- Floating-point Constant:
3.14, -0.99, 2.5e3<\/code><\/li>\n- Character Constant:
'A', 'b', '$'<\/code><\/li>\n- String Constant:
\"Hello\"<\/code>, \"12345\"<\/code><\/li>\n<\/ul>\n\u00a02. Variables:<\/strong><\/h3>\nVariables are memory locations that hold data and whose value can change during program execution.<\/p>\n
\n- They should have meaningful names.<\/li>\n
- The value stored in a variable can be updated.<\/li>\n<\/ul>\n
Declaration and Initialization:<\/strong><\/h3>\n\n# Python example<\/span>
\nage = 25<\/span> # Variable 'age' holding an integer value<\/span>
\nname = \"Alice\"<\/span> # Variable 'name' holding a string value<\/span>
\n<\/code><\/div>\n<\/div>\n\nc<\/div>\n\n<\/div>\n<\/div>\n\/\/ C example<\/span>
\nint<\/span> age = 25<\/span>; \/\/ Variable 'age' holding an integer value<\/span>
\nchar<\/span> name[] = \"Alice\"<\/span>; \/\/ Variable 'name' holding a string value<\/span>
\n<\/code><\/div>\n<\/div>\n\u00a03. Keywords:<\/strong><\/h3>\nKeywords are reserved words that have special meanings in programming languages. They cannot be used as variable names.<\/p>\n
Examples of Keywords:<\/strong><\/h3>\n\n- In Python:<\/strong>
if<\/code>, else<\/code>, while<\/code>, for<\/code>, def<\/code>, return<\/code>, break<\/code><\/li>\n- In C\/C++:<\/strong>
int<\/code>, float<\/code>, char<\/code>, if<\/code>, else<\/code>, while<\/code>, return<\/code>, void<\/code><\/li>\n- In Java:<\/strong>
class<\/code>, static<\/code>, public<\/code>, void<\/code>, new<\/code>, try<\/code>, catch<\/code><\/li>\n<\/ul>\n\u00a0Differences Summary:<\/strong><\/h3>\n\n