What do quantile and var() functions do?

Q. What do quantile and var() functions do?

Answer =

DataFrame.quantile (q=0.5, axis=0, numeric_only=True, interpolation='linear')
Return values at the given quantile over requested axis.
And, Returns Series or DataFrame

If q is an array, a DataFrame will be returned where the index is q, the columns are the columns of self, and the values are the quantiles.

If q is a float, a Series will be returned where the index is the columns of self and the values are the quantiles.

DataFrame.var(axis=None, skipna=None, level=None, ddof=1, numeric_only=None, **kwargs)

Return unbiased variance over requested axis.