Const vs Readonly in C#

const vs readonly

Const

• ** Const is compiled time constant**
• Declaration and initialization at the same time
• Can not be changed public const int cmToMeter = 100;

Readonnly

• Readonly is runtime constant
• Decalaration and initialization not mandatory in same time we can intialise later on
• We can change the value

public static readonly double PI = 3.1;
public static readonly double PI;
PI = 3.14