Prove or Disprove: for All Integers $$a , b \text {, if } a \mid b \text { and } b \mid a \text {, then } a = b \text {. }$$

True/False

Prove or disprove: For all integers $$a , b \text {, if } a \mid b \text { and } b \mid a \text {, then } a = b \text {. }$$