An expression is made up of a series of literals and variables separated by operators. Operators are used in
PL/SQL to manipulate, compare, and calculate data. An expression is made up of two parts : operators and operands.
Operands : These are an argument to the operators. Operands can be a variable, function call or constant.
Operators : These specify the actions to be performed on operators. Example: ‘+’, ‘*’, etc.
