Comparators in sort

#1

In bubble sort we do
if (a[j] > a[j + 1])
{
swap(a[j], a[j + 1]);
}
in order to sort in increasing order
but in compare function we used
return a>b;
i m unable to understand please clear it

#2

the compare function return true or false on the basis of comparison if the comparison returns true a is placed before b else otherwise

#3

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