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:

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

part1

Nice! @ahhhchoo can you do it with a for loop as well?

i broke my dart

i broke my dart

Lol

btw by for loop I mean within the function

my dart keeps crashing, i think because i wrote the loop wrong.

Yeah because the “star” variable never changes. You can increment a variable by writhing “star = star + 1”

Very nice

Im confused, why isnt star + 1 equivalent to star ++ ? Also i didnt know what you meant by your comment "Yeah because the “star” variable never changes. You can increment a variable by writhing “star = star + 1” So i did my own workaround and apparently it worked when I used ++

Oh yeah sorry star++ is equivalent to star = star + 1

star + 1 by itself will not change star, star = blahblah will

Ahh i see, thank you so much. I was so confused why it wasn't working.

cool! Np! Do you think you can tackle part 3?

How can i use 'star' in my repeatString function?

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