When you wear the armor do you get a row of armor chest plates above the hearts?
How much of that row is white?
Full diamond armor should turn the whole row white.
Unenchanted armor doesn't provide anywhere as much protection as fully enchanted armor, even with full diamond you still have to be careful, attacking more than one mob at a time is still dangerous and having a creeper explode next to you will likely kill you.
I'm finding it really hard to understand exactly what it says but I THINK it's saying that in the Bedrock Edition (on XBox, for instance) unenchanted full diamond armor gives a flat 80% protection (against damage types it protects against) where as in the Java Edition it varies depending on the strength of the attack, with a maximum of 80% for very weak attacks and decreasing to a minimum of 60% for very strong attacks.
Which would mean that in Java you get up to twice the damage.
Now, I'm not absolutely certain that I've got that right, hopefully somebody who understands it better will come along.
But I would definitely suggest looking to start enchanting as soon as possible.
Do you now if it's easier on x-box, because, my boyfriend plays on x-box, and he feels like he gets much more protection with diamond armour than me when he watches me play.
Thank you a lot for the answer.
XBox (Bedrock or otherwise) does not have the changes in Java 1.9 which made armor weaker, particularly against strong attacks; prior to then you can easily survive a point-blank (standing right inside of it) creeper explosion even on Hard; 80% damage reduction lets 20% of 73 damage through for 14.6 health or about 7 hearts lost at the very most; damage is about half as high at the distance at which they stop moving before exploding. Maxed-out Blast Protection offers an additional 52-80% damage reduction (acting on damage that got through armor and randomized) for an overall average of 93.2% (ranging from 90.4-96%).
For comparison, in Java 1.9+ this much damage will penetrate 18.25 armor points (for full diamond every 4 damage penetrates 1 armor point, for other armor it is 2 damage per point, calculated as (toughness / 4 + 2), where "toughness" is the sum of the armor toughness attribute for all pieces), limited to 80% of 20 or 16, leaving you with only 16% damage reduction, while maxed-out Blast Protection reduces damage by an additional 80% (no longer randomized) for an overall minimum protection of 83.2%, making enchantments far more valuable in 1.9+.
Also, in any case armor does not reduce all damage; fall damage can only be reduced with Protection and Feather Falling enchantments, otherwise it is unaffected; the same applies to status effects like Poison (only reduced by Protection), damage from being on fire (Protection and Fire Protection, the latter also reduces the burn time; note that armor does protect against fire and lava blocks), and so on; a complete list can be found here (note that damage sources that are not reduced by armor also do not damage it, except in Pocket Edition, so this is an easy way to tell if armor is effective against it. Damage reduction from enchantments also has no effect on durability). Due to the aforementioned changes to enchantments in 1.9 you can get significantly higher protection against these forms of damage (e.g. the guaranteed minimum survivable fall distance increased from about 44 to 103 blocks).
I think you misunderstand the meaning of the armor bar. In many games, if you put on armor, you get an 'armor bar' that absorbs some or all damage to health, and gets depleted as you take damage. Once armor bar is all down to 0, you start taking full damage to health.
In Minecraft, your armor bar means how much protection you get from armor. It does not go down as you take damage. It only goes down when a piece of armor loses all durability and disappears. Armor provides its full protection benefit until it breaks - same as brand new sword deals as much damage as an almost worn out one. This is quite easy to confirm. Make a small cabin, close off the entrance with a fence. If you stand right next to fence, a zombie can hit you. Compare how much damage you take from a zombie hit when...
Wearing no armor.
Wearing only a couple pieces
Wearing full armor.
And as others said, regular armor does not protect from environmental damage like falls or fire.
Each armor piece has a damage bar visible under it in the inventory and hovering the mouse pointer over the piece gives you a numerical indication of how damaged it is. Neither the bar or the numbers show up until the piece has taken its first damage.