Iterating Over a List
Part of the Fundamentals section of Coddy's Dart journey — lesson 55 of 94.
The for-in loop provides a simple way to iterate through all elements in a list. It's cleaner than using a traditional for loop with indices.
Create a list of fruits:
List<String> fruits = ['Apple', 'Banana', 'Orange'];
Use a for-in loop to iterate through each element:
for (String fruit in fruits) {
print(fruit);
}
After executing the above code, the output will be:
Apple
Banana
OrangeChallenge
BeginnerIn this challenge, you'll practice using a for-in loop to iterate through a list of fruits and print each one. The for-in loop is a simple way to process each element in a list one by one.
Complete the code below to print each fruit in the fruits list on a separate line using a for-in loop.
Expected output:
Apple
Banana
Orange
Mango
StrawberryCheat sheet
The for-in loop provides a simple way to iterate through all elements in a list:
List<String> fruits = ['Apple', 'Banana', 'Orange'];
for (String fruit in fruits) {
print(fruit);
}
This will output each element on a separate line:
Apple
Banana
OrangeTry it yourself
void main() {
// List of fruits (already defined for you)
List<String> fruits = ['Apple', 'Banana', 'Orange', 'Mango', 'Strawberry'];
// TODO: Use a for-in loop to iterate through the fruits list
// and print each fruit on a separate line
// The loop should print each fruit like this:
// Apple
// Banana
// Orange
// ...
}This lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Fundamentals
4Operators Part 2
Comparison OperatorsLogical ANDLogical ORLogical NOTType Test OperatorsRecap - Making Comparisons7Working with Strings
String ConcatenationString InterpolationMulti-line StringsString PropertiesBasic String Methods10Collections - Maps Basics
What are Maps?Creating a MapAccessing Values by KeyKey-Value PairsGetting Map SizeGetting KeysGetting ValuesChecking if a Key Exists13Null Safety In Depth
Understanding NullNullable TypesNon-Nullable TypesNull Assertion OperatorLate InitializationRecap - Handling Null Safely16Fundamentals Challenges
Challenge: List of calculationChallenge: Sum of numbersChallenge: Find product2Variables and Basic Data Types
What are Variables?StringsIntegers (int)Doubles (double)Booleans (bool)Type Inference with 'var'Final VariablesConstant VariablesNaming ConventionsBasic Null SafetyRecap - Declaring Variables8Control Flow - Loops
The 'for' LoopThe 'while' LoopThe 'do-while' LoopUsing 'break' in LoopsUsing 'continue' in LoopsRecap - Repeating Code3Operators Part 1
Arithmetic OperatorsInteger DivisionModulo OperatorIncrement and DecrementAssignment ShortcutsRecap - Simple Calculations6Control Flow - Decision Making
The 'if' StatementThe 'else' StatementThe 'else if' StatementRecap - Simple DecisionsNested 'if' StatementsThe 'switch' Statement9Collections - Lists Basics
What are Lists?Creating a ListAccessing by IndexGetting List LengthAdding ElementsRemoving ElementsChecking if a List is EmptyIterating Over a List12Functions Advanced
Optional Positional ParametersNamed ParametersRequired Named ParametersDefault Parameter ValuesRecap - Function Parameters15Project: Simple Calculator
Setting UpDeclaring Number