<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Write a function to calculate the triangular number of a given number n.
<|im_end|>
<|im_start|>assistant
def getTriangularNumber(n):
    return int(n * (n + 1) / 2)<|im_end|>
