What is a constant?

Question

php

Answer 1

whose value can't be changed​

Answer 2

A Variable whose value cannot be changed programmatically.

Answer 3

constant are those value who's value will not change.

Answer 4

constant cannot be changed. They are permanently hard coded.

Answer 5

once you defined and initialised a constant variable with value, you cannot change the value. constant variable can be initialised only once.