Challenge: triangle number

Question

Make a code that create a triangle with numbers like that:
1
12
123
1234
For that use an input to get the number of level in the triangle (in this example it's 4)
Then write the sum of all the numbers in the triangle

Answer 1

Here you go
https://code.sololearn.com/c9vtfQm1cldT/?ref=app

Answer 2

also here: https://code.sololearn.com/W9DuF7K3w16R/?ref=app

Answer 3

https://code.sololearn.com/ck8w96MG1G3E/?ref=app

Answer 4

here it is... still in beta, shape is not perfect with limit greater than 9
https://code.sololearn.com/ct0dO0E1HQmC/#cpp

nice challenge! 👍✌

Answer 5

My attempt in PHP: https://code.sololearn.com/wkL4heVdVT1O/#

Nice challenge. :)

Answer 6

https://code.sololearn.com/cTROqLZmeRw1/?ref=app

Answer 7

HERES THE NEW CHALLENGE...
CHECK IT OUT FRIENDS
https://www.sololearn.com/discuss/653982/?ref=app