Question

what is const double in c++?

Answer 1

A "const" declaration means that the variable cannot be changed. A double declaration means a floating point (decimal) number with double precision (meaning you can save more digits).

You might use this like so:

const double PI = 3.1415926535

You know the value of pi will never change, so you declare it a constant so you can just type PI instead of the number itself.

Answer 2

With the const prefix you can declare constants with a specific type in the same way as you would do with a variable:

const int pathwidth = 100;
const char tabulator = '\t';
const double Pi = 3.1415

Answer 3

Here const is a prefix and double , int , char are the data types .

Answer 4

Thanks :))

Answer 5

you're welcome:)