三角形数是一个数，它是从 1 到某个整数 n 的整数之和

Question

The full question is A triangular number is a number that is the sum of the integers from 1 to some integer n. Thus 1 is a triangular number because it's the sum of the integers from 1 to 1; 6 is a triangular number because it's 1+2+3=6. Given the non-negative integer n, create a list of the first n triangular numbers. Thus is n was 5, the list would be: [1, 3, 6, 10, 15]. Associate the list with the variable triangulars.

I have to put it in myprogramminglab.

I have tried the following:

sum=0

triangulars = []

for i in range(1,n+1):

    sum += i

triangulars.append(sum)

I am getting an error that triangulars does not contain the correct vale.

when I put a value in , it says to delete it.

please help!

Answer 1

Append should be indented within loop and n should be defined

n=int(input('Enter no.of Triangulars you want:'))

triangulars = []

sum=0

for i in range(1,n+1):

        sum += i

        triangulars.append(sum)