How do you compute the altitude?

It's the same thing dude. :? There is no difference~

height above sea level.. . Science Major: Altitude is height above mean sea level (MSL) or true altitude, which means in reference to what sea level is on the ground, or height above ground level...

Compute simply means to calculate so calculation can be said computing. Adding, subtracting, finding products and division are all the process of computing. So, Just add 2 +3 , then you are computing...

It means function. Basically, it says "Do this task" to the computer and/or machine. EX: Lets say I'm on a calculator, 1+1 Compute...... = 2

1 = 2