What is the difference between hydrogen bonds and covalent bonds?

In covalent bonding, electrons are shared between atoms of the same or different elements, such that each atom contributes to the shared electron so as to attain a stable or noble gas configuration. Covalent molecules are usually formed among atoms of hydrogen or non-metals of groups 4, 5, 6, and 7. Examples of covalent bonding are the formation of the hydrogen molecule, chlorine molecule, oxygen molecule, nitrogen molecule.

A hydrogen bond is an unusually intermolecular attractive force; it is a special dipole-dipole force. Examples of hydrogen bonds are HF, H2O, and NH3. Hydrogen bonds occur between hydrogen atoms that are covalently bonded to small and highly electronegative atoms. When writing did hydrogen bond, they are represented with dotted lines. A hydrogen bond is among the most common intermolecular forces.

These are known to be two types of bonds that are different from each other. The covalent bond is usually formed when electron pairs are shared. Hydrogen bonds are formed when hydrogen and electronegative atom are formed together. Take note that hydrogen bonds, in general, are considered to be weak so there would need to be a lot so that it can be strong.

One example of a covalent bond that is very popular is H-O-H. One example of a hydrogen bond is the bond that is formed between water and ice. The DNA of these two is known to come with two strands of DNA between ice and water.