See the following snippet:

        //first nested loops
       for(int i=0;i<10;i++) {
        for(int j=1;j<1000000;j++) {
            //do some stuff
        }
    }
            //second nested loops
       for(int i=0;i<1000000;i++) {
        for(int j=1;j<10;j++) {
            //do some stuff
        }
    }

I am wondering why the first nested loops is running slower than the second one?

Regards!