Bubble sort through recursion

#1

in the fun why did he wrote return before the funtion. Not able to understand when to write return + fun and only fun name.

#2

Lets take this example

fun1()
{
return 1;
}
fun2()
{
return fun1();
}
fun3()
{
fun1;
}

When fun2 executes, it returns the value 1 returned by fun1.
When fun3 executes, it just calls fun1 which returns 1 but this 1 isn’t used anywhere.
When you want to return a value returned by another function, you write return fun();
When you just want to call a function , you write fun();

#3

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