I believe it means what the height temperature is.
When a teacher you know says hi to you it means they are being polite and acknowledging you.
Nothing. He is being nice. Say hi back.
He's flirting.
It could mean that or he is just trying to be nice.
it means he is complementing you but is a little odd.
crush
well i guess they are obviously nice!
He really likes you
If a person says hi to you and then laughs, they may be a shy person who doesn't know what else to say. Just say hi back to them and make a new friend.
When a thermometer displays "L", it typically indicates that the temperature reading is below the thermometer's lower limit or range of measurement. This could be due to the temperature being too low for the thermometer to accurately detect.
It means he likes you - a lot.
it means hi or hey what's the matter