Which console do you mean? If the unreal console(“Output Log”), see below.
new link:
Console Log:
UE_LOG(LogTemp, Warning, TEXT("Your message"));
UE_LOG(YourLog, Warning, TEXT("This is a message to yourself during runtime!"));
On Screen:
GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, TEXT("This is an on screen message!"));
GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, FString::Printf(TEXT("Some variable values: x: %f, y: %f"), x, y));