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Increment Decrement Operators

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:

  1. 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.
  2. ++Variable_Name: As the ‘++’ sign is before the variable name, it is a pre increment operation. This means that the variable is incremented before the 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 the execution of the statement.

Example of post decrement operation

post decrement operation:

Example of pre decrement operation:

pre decrement operation:

Conclusion

As now you have learned the increment and the decrement operators, we will move on to for loops in the next topic.

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