#### What is operator ?

An operator is a sign or a character which denotes some action. There are various operators, and every operator has some specific work. The operators who do the basic calculation like addition, subtraction, etc., are arithmetic operators; the operators who check the conditions are relational operators. Some are logical operators and many more. Now every operator has its precedence level. If more than one operator comes in one expression, the operation gets done according to their precedence level.

#### Operators with there precedence and associativity

Category | Operator | Associativity |

Postfix |
() [] . -> ++ -- |
Left to Right |

Unary |
Misc operators |
Left to Right |

Multiplicative |
*%/ |
Left to Right |

Additive |
- |
Left to Right |

Shift |
<< >> |
Left to Right |

Relational |
< > <= >= |
Left to Right |

Equality |
== != |
Left to Right |

Bitwise AND |
& |
Left to Right |

Bitwise XOR |
^ |
Left to Right |

Bitwise OR |
| |
Left to Right |

Logical AND |
&& |
Left to Right |

Logical OR |
|| |
Left to Right |

Conditional |
?: |
Right to Left |

Assignment |
= += -= *= /= |
Right to Left |

Comma |
, |
Left to Right |

This Operator precedence method is used while converting the expressions.

There are three conversions of expressions which are,

- Infix expression
- Prefix expression
- Postfix expression

These conversion methods were used while converting any expression tree in data structure.