Increment Operator
Dart Arithmetic Increment Operator takes a numeric variable as operand and increments (updates) its value by 1.
Based on the side at which the operand comes for the increment operator, there are two kinds.
- Post Increment – The value in variable is incremented after the execution of the statement.
- Pre Increment – The value in variable is incremented first, and then the statement is executed.
Symbol
++
symbol is used for Increment Operator.
Syntax
The syntax for Increment Operator is
operand++ //post increment ++operand //pre increment
Examples
Post Increment
In the following example, we take an integer value in a variable x
, and increment it using Arithmetic Post Increment Operator.
main.dart
void main() { var x = 5; x++; print('x = $x'); }
Output
x = 6
Let us try to print the value of x
during post-increment process, and observe how x
is updated.
main.dart
void main() { var x = 5; print('x = ${x++}'); print('x = $x'); }
Output
x = 5 x = 6
Pre Increment
In the following example, we take an integer value in a variable x
, and increment it using Arithmetic Pre Increment Operator.
main.dart
void main() { var x = 5; ++x; print('x = $x'); }
Output
x = 6
Let us try to print the value of x
during pre-increment process, and observe how x
is updated.
main.dart
void main() { var x = 5; print('x = ${++x}'); print('x = $x'); }
Output
x = 6 x = 6
Conclusion
In this Dart Tutorial, we learned how to use Increment Operator to increment the numeric value in a variable by one.