Why is break used here to break out of if statement

Why is break used here to break out of if statement? Is it allowed?

And why are x and y made 0 at the end? { x = 0, y = 0 }

https://www.hackerearth.com/practice/basic-programming/input-output/basics-of-input-output/practice-problems/algorithm/vowels-love/submissions/**

#include<stdio.h>
#include<string.h>

int main(){
int i,x=0,j,y=0,T,p,q;
char s1[1000001], v1[6] ="aeiou", v2[6] = "AEIOU";
scanf("%d",&T);
for(q=0;q<T;q++){
scanf("%s",&s1);
p=strlen(s1);
for(i=0;i<5;i++){
   for(j=0;j<p;j++){
       if(v1[i]== s1[j]){
           y++;
           break;}}}
       
for(i=0;i<5;i++){
    for(j=0;j<p;j++){
         if(v2[i]== s1[j]){
             x++;
             break;}}}

if(y==5 || x==5) 
    printf("lovely string\n");

else
    printf("ugly string\n");

x=0;
y=0;
}
return 0;
}