Update index.md to add comma (#33019)

Add an Oxford comma on line 41
2018-10-31 18:08:17 -05:00 · 2018-10-31 18:08:17 -05:00 · 97920cca8e
parent ea7ab5e2dc
commit 97920cca8e
1 changed files with 1 additions and 1 deletions
--- a/guide/english/algorithms/exponentiation/index.md
+++ b/guide/english/algorithms/exponentiation/index.md
@ -38,7 +38,7 @@ int power(int x, unsigned int y) {

 ## Modular Exponentiation

-Given three numbers x, y and p, compute (x^y) % p
+Given three numbers x, y, and p, compute (x^y) % p

 ```C
 int power(int x, unsigned int y, int p) {