Whats the difference between ionic covalent and metallic bonds

Covalent Bond: A covalent bond is formed between two non-metals that have similar electronegativities. Neither atom is "strong" enough to attract electrons from the other. For stabilization, they share their electrons from outer molecular orbit with others.

Ionic Bonds: An ionic bond is formed between a metal and a non-metal. Non-metals(-ve ion) are "stronger" than the metal(+ve ion) and can get electrons very easily from the metal. These two opposite ions attract each other and form the ionic bond.

Metallic Bond : Metallic bond: "the chemical bond, which is characteristic of metals, in which mobile valence electrons are shared among atoms in a usually stable crystalline".

Subtract the electronegativities of the elements and use this criteria:
0-.4 is nonpolar covalent
.4-1.7 is polar covalent
1.7+ is metallic

I believe ionic is between two metals and electrons are transferred

And covalent is between a metal and a non metal electrons are shared

one's metal