Find the Largest of 3 Values

I trying to figure out how to find the largest of 3 values. I got fairly close using if/else statements but it always breaks somewhere. Ideally I would like to get the 3 values as small, med and large. Thanks.

Here's where I left off:

if (a > b) {
if (a > c){
v = a
}
else {
if (b > c){
if (b > a)
v = b
}
else {
if (c > a)
v = c
}
}
}
else {
v = c
}