How to Use If Else Statement in Dart Easily

Understanding how to use the if else statement in Dart is essential for beginners and developers working on conditional logic in Flutter or Dart-based applications. The if else structure allows your program to make decisions based on conditions and respond differently depending on whether the condition evaluates to true or false.

What Is an If Else Statement in Dart?

The if else statement in Dart is used to execute certain blocks of code based on whether a condition is true or false. Dart also supports else if for checking multiple conditions in a structured way.

Syntax:

void main() {
  int number = 10;

  if (number > 0) {
    print("The number is positive.");
  } else if (number == 0) {
    print("The number is zero.");
  } else {
    print("The number is negative.");
  }
}

In the example above:

• If number > 0, the program prints that the number is positive.
• If the number is exactly 0, it prints a different message.
• If none of the above, it falls into the else clause.

Use Cases:

• Validating user input
• Controlling app navigation
• Handling dynamic UI changes
• Filtering data based on conditions
• Executing fallback logic

Best Practices:

• Always ensure conditions are clear and concise.
• Avoid deeply nested if-else blocks.
• Consider using switch if you have multiple discrete cases.

For further reading on Dart’s control flow, visit this official Dart language guide.