Indentation plays a vital role in Python. Let's look at an R program. Anything between a pair of curly braces belongs to the same logic block. If we have multiple lines, the indentation is not important for R programs, as shown in the following code:

pv_f<-function(fv,r,n) {   # this is an R program
    pv<-fv*(1+r)^(-n)
pv
}

To achieve the same result in Python, we use indentations instead. This means that all the lines with the same indentation belong to the same scope, as shown in the following code:

def pv_f(fv,r,n):
    pv=fv/(1+r)**n
    return pv

The following are the ways to input values: