Practice problem #1

dart-pset-1.md

Printing triangles

Part I

Write the function repeatString that takes a String and an integer, and returns a String built by repeating the given String given number of times.

For example, one should be able to call

print(repeatString("*", 10));

and get

**********

as the output.

Hint

You can add to Strings together by:

String a = "Hello, ";
String b = "Alina";
print(a + b); // It'll print out "Hello, Alina"

Part II

Use the printString function you wrote along with a for loop to print out this 6x6 triangle:

*
**
***
****
*****
******

Part III (Optional)

Use the printString function you wrote along with a for loop to print out this triangle:

*******
 *****
  ***
   *

You don’t. You want to call repeatString function multiple times every loop cycle.