Dart If

Dart If is a simple conditional statement where a block of statements get executed if the given boolean expression evaluates to true.

Syntax

The syntax of if statement in Dart is shown below.

 if (boolean_expression) {
     //statement(s)
 }

where the boolean_expression evaluates to, or promotes to boolean value: true or false.

If the boolean_expression is true, statement(s) get executed.

If the boolean_expression is false, statement(s) does not execute and continues with the statements after if statement.

Example

In the following example, we will check if the given number in x is even.

main.dart

void main(){
	int x = 8;
	
	if(x%2==0){
		print('$x is even number.');
	}
}

Output

10 is even number.

Now, we will change the value in x to 7, and execute the same if-statement as in the above program.

main.dart

void main(){
	int x = 7;
	
	if(x%2==0){
		print('$x is even number.');
	}
}

Output


Since the condition in if-statement evaluates to false, the statement(s) inside if-block are not executed.

Conclusion

In this Dart Tutorial, we learned about Dart If-Statement, its syntax and usage, with examples.