whats the default password for sa in sql server 2014 code example

Example 1: what is the default password for sql server sa

ALTER LOGIN [sa] ENABLE

Example 2: what is the default password for sql server sa

EXEC xp_instance_regwrite N'HKEY_LOCAL_MACHINE', 
    N'Software\Microsoft\MSSQLServer\MSSQLServer', N'LoginMode', REG_DWORD, 2