What is the difference between value and variable?

Answer 1

A literal is a value that can be assigned to a constant or a variable.

A constant is a named memory address in which only one value can be stored. The value must be assigned at compile time and cannot change at runtime.

A variable is a named memory address in which any binary value can be stored. Variables can be initialised at compile time but can change value at runtime.

Examples:

int i = 42; // assign the literal value 42 to the variable i.

const float pi = 3.14; // assign the literal value 3.14 to the constant pi.

char c[] = "Hello world"; // assign the string literal to the character array c.

Answer 2

A literal and a constant are essentially the same thing. The only real difference is that a constant is defined once (much like a local variable) whereas a literal is defined every time it is used. As a result, prevalent use of the same literal will increase code size. However, modern compilers will pool literals and replace them with constants wherever it is beneficial to do so.

Answer 3

the letters and pronunciation. may be this is in englishcontext.. but in computer science context -->a literal is a constant text/numbers like "123", "apple" and "abc123" etc. where as a figurative constant is a symbolic representation of the constant like PI, max-number,high-values,low-value and MESG, etc which represent 3.14,1500,100,1 and "WELCOME" etc. correspondingly

Answer 4

Literals are the symbols whereas the identifiers are the keywords.

Well, no, but an example may help:

12, 1e3, 0x4a, 'a', "Hello\n" -- literals

_debug, n, stdio, main, argc, printf -- identifiers

Answer 5

A value is a constant; it wont change. A variable varies; it's usually represented by a letter like x or y, and its value, or the amount it represents, can change.