Are there a names for this condition patterns?

There are two ways to ensure a condition is met:

• The simple way is using anif with the condition:

  if (condition)
  {
      /* execute code */
  }
  
  

• The other way is similar but I check for the negated condition and return if this is given:

  if (!condition)
  {
      return;
  }
  /* execute code */
  
  

Are there names for this patterns? I tried googleing it but was not successfull...