Arduino IDE: Increment & Decrement Operator

About This Tutorial
This tutorial discusses what are increment operator and decrement operator, two of the many arithmetic operators, their two different structures, and how to use them in Arduino IDE.
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1

Components Required

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evive1
USB A-B Cable1

Increment Operator

The increment operator is an Arduino arithmetic operator that increments an integer variable by a value of one. This is useful in certain types of loops.

Two possible structures of increment operator:

  • Variable_Name++ : As the ++’ sign is after the variable name, it is a post increment operation. This means that the variable is first used in the statement and incremented after the statement execution.
  • ++Variable_Name : As the ‘++’ sign is before the variable name, it is a pre increment operation. This means that the variable is incremented before execution of the statement.

Example showing the working of the post increment operation:

Increment Operator

Example showing the working of the pre increment operation:

pre increment operation:

Decrement Operator

The decrement operator is used to decrement an integer variable by a value of one.

Two possible structures of increment operator:

  • Variable_Name – – : As the –‘ sign is after the variable name, it is a post decrement operation. This means that the variable is first used in the statement and decremented after the statement execution.
  • – – Variable_Name : As the –‘ sign is before the variable name, it is a pre decrement operation. This means that the variable is decremented before execution of the statement.

Example of post decrement operation

post decrement operation:

Example of pre decrement operation:

pre decrement operation:

 

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