Operators are special symbols that perform specific operations on one, two, or three operands, and then return a result.

An operator is a symbol that operates on one or more arguments to produce a result.

In Java, an expression carries out some operation or operations that are directed by a list of allowed operators. An operator acts upon one, two or three operands.

An operator takes one or more arguments and produces a new value.

An expression is a statement that can convey a value. Some of the most common expressions are mathematical, such as in the following example:

int x = 3;
int y = x;
int z = x * y;

Most of the expressions in Java use operators such as “*”. Operators are special symbols used for mathematical functions, some types of assignment statements, and logical comparisons.

Operator define the actions to be performed on the operands in an expression. Depending on the number of operands on which an operator acts, operators are classified as unary, binary, and ternary operators.

Unary operator act on a single operand. Binary and ternary operators act on two and three operands respectively.