# Compiler Error CS0818

Implicitly typed locals must be initialized

An implicitly typed local variable must be initialized with a value at the same time that it is declared.

## To correct this error

1. Assign a value to the variable or else give it an explicit type.

## Example

The following code generates CS0818:

// cs0818.cs
class A
{
public static int Main()
{
var a; // CS0818
return -1;
}
}