# Define a function called power that takes two parameters, 
# a and b. Give a a default value of 2. The function should print the result 
# of a raised to the power of b (a^b). 

power <- function (a = 2, b) {
    return (a^b)
}
a <- 2
b <- 3
print(power(a, b))
print(power("b" = b))