if...else Statement in Dart
This image illustrates the basic structure of a conditional statement in programming:
First, the code runs and a condition is checked. If the condition is true, the if block executes; if false, the else block runs. After that, the program continues with the next part of the code, allowing it to make decisions based on conditions.
if (condition)
{
// Code block `if` condition is `true`
}
else
{
// Code block `if` condition is `false`
}
An if can be followed by an optional else block. The else block will execute if the Boolean expression tested by the if block evaluates to false.
main.dart
123456789101112void main() { int age = 17; if (age >= 18) { print("You're an adult."); } else { print("You're not an adult yet."); } }
In the example above, the age < 18, so the if code block hasn't been executed. The else code block executes when the if condition is false. The else syntax is like the if syntax without a condition and parentheses ( ).
You can also write a condition for the if statement to check whether the variable is of type int by using is operator.
main.dart
123456789101112void main() { var num = 7.0; if(num is int { print('Type: int'); } else { print('Type: other type'); } }
Thanks for your feedback!
Ask AI
Ask AI
Ask anything or try one of the suggested questions to begin our chat
Awesome!
Completion rate improved to 4.55if...else Statement in Dart
Swipe to show menu
This image illustrates the basic structure of a conditional statement in programming:
First, the code runs and a condition is checked. If the condition is true, the if block executes; if false, the else block runs. After that, the program continues with the next part of the code, allowing it to make decisions based on conditions.
if (condition)
{
// Code block `if` condition is `true`
}
else
{
// Code block `if` condition is `false`
}
An if can be followed by an optional else block. The else block will execute if the Boolean expression tested by the if block evaluates to false.
main.dart
123456789101112void main() { int age = 17; if (age >= 18) { print("You're an adult."); } else { print("You're not an adult yet."); } }
In the example above, the age < 18, so the if code block hasn't been executed. The else code block executes when the if condition is false. The else syntax is like the if syntax without a condition and parentheses ( ).
You can also write a condition for the if statement to check whether the variable is of type int by using is operator.
main.dart
123456789101112void main() { var num = 7.0; if(num is int { print('Type: int'); } else { print('Type: other type'); } }
Thanks for your feedback!
