why in for loop, outer is less then 9,instead of 10

Question

#include<stdio.h>
main()
{
int ctr; //for loop
int idSearch,tempId,inner,outer;//search customer id
int found=0;
int didSwap=0;
int custId[10]={111,222,333,444,555,666,777,888,999,100};
float custBal[10]={2.3,900,85,232,44,85,101,54,78,65};
float tempBal;
//initialize the for loop
for(outer=0;outer<9;outer++)
{
for(inner=outer;inner<10;inner++)
//rest of the code

Answer 1

Last element automatically gets sorted that is why we use <9 and not <10

(in case of selection and bubble sort, which it looks like)

Answer 2

Can you please share the full code, or At least tell what this code is gonna do?

Answer 3

Sort arrays in ascending order

Answer 4

Thanks