A
Symbol  Format  Data 

A  Code Point 
U+0041 
TeX 
A 

SVG 
In math, the capital Latin letter A is used in algebra as a variable. In probability, the symbol is often used to represent a random variable. In linear algebra, the symbol is often used as a variable to represent a matrix. For example, the symbol is typically used in an expression like this:
In plain language, this expression means that the variable is equal to the twobytwo matrix with the coefficients , , and .
The latin letter a is used to represent a variable or coefficient.
The compound interest formula calculates the growth of an initial value whose interest compounds over time. The frequency of when the interest is calculated and added to the initial amount can occur continuously,