"The linkage formed, as a result of the electrostatic attraction between the positive and negative ions, was termed electrovalent linkage.''
The atom that loses the electrons becomes a positively charged ion which is named a cation, while the one that gains them becomes a negatively charged ion which is named an anion.
The electrovalent linkage is present in ionic compounds.
Sodium chloride is an ionic compound that exhibits electrovalent linkage.
Hence, the electrovalent linkage is present in ionic compounds.