The difference between const in c and c++

In C and C, the const keyword is used to declare constants. In C, const can only modify variables, not pointers or arrays; in C, const can modify variables, pointers, and arrays. The main differences are: scope, pointer modification, and initialization requirements.

Difference between const in C and C

const keyword

const is a type qualifier in C and C that is used to declare constants. Constants are values ​​that cannot be modified during program execution.

const in C

• In C, const can only modify ordinary variables, not pointers or arrays.
• Variables modified by const must be initialized when declared.
• const variables can be modified indirectly through pointers.

const in C

• const in C can modify variables, pointers and arrays.

• In C, const can be declared as one of two types:

  • const variable: a value that cannot be modified.
  • const pointer: a pointer to a variable whose value cannot be modified.
• In C, const variables cannot be modified indirectly through pointers.

Main Differences

The following are the main differences between const in C and const in C:

• Scope: In C, const can only modify ordinary variables, but in C, it can modify variables, pointers and arrays.
• Pointer modification: In C, const variables can be modified indirectly through pointers, but in C, this is not allowed.
• Initialization: In C, const variables must be initialized when declared, while in C, there is no such requirement.

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