This Triangle Number is produced by a pattern of dots that form a triangle. The first 5 numbers in a row, or dots, are: 1, 3, 6, 10, 15 This means that the first triangle has only one dot, the second...

Java Script

Extracted text: This Triangle Number is produced by a pattern of dots that form a triangle. The first 5 numbers in a row, or dots, are: 1, 3, 6, 10, 15 This means that the first triangle has only one dot, the second has three dots, the third has 6 dots and so on. Write a function that returns the number of dots when you are given their corresponding triangular number sequence. Examples triangle (1) -1 triangle (6) - 21 triangle (215) 23220