⚡ TL;DR
Print the alphabet rectangle pattern in Dart. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
The Alphabet Rectangle pattern is a classic loop exercise. Here’s the complete implementation in Dart with working code and output.
Pattern to Print
ABCDE
ABCDE
ABCDE
ABCDE
ABCDEImplementation
void main() {
int rows = 5, cols = 5;
for (int i = 0; i < rows; i++) {
String row = '';
for (int j = 0; j < cols; j++) { row += String.fromCharCode(65 + j); }
print(row);
}
}Output
ABCDE
ABCDE
ABCDE
ABCDE
ABCDEHow It Works
Print an n×m grid where each row spells out the alphabet starting from A.
Practice Variations
- Try printing the pattern with a different character (e.g.,
#or+) - Modify the code to accept the pattern size as user input
- Combine this pattern with its inverse to create a more complex shape
Complexity
- Time: O(n²) — the grid or line count grows quadratically
- Space: O(1) — only loop counters are needed
Related Patterns
- Alphabet Rectangle in Python
- Alphabet Rectangle in Go
- Alphabet Rectangle in Swift
- Hollow Alphabet Square in Dart
- Letter X Shape in Dart
- Alphabet Rhombus in Dart
FAQ
How do you print the Alphabet Rectangle pattern in Dart?
Use nested loops: the outer loop walks through the rows while the inner loop prints the characters or values for each row. The complete Dart implementation with expected output is shown in the sections above.
What is the time complexity of the Alphabet Rectangle pattern in Dart?
The time complexity is O(n²) and the space complexity is O(1), since the pattern is built with a fixed number of loop counters and printed row by row.
Happy coding!
