Who can explain this code to me?

Question

Who can help me about this code?
How does this code work?

int [] a = {1,2,3,4,1};
for(int n: a){ a[n]=0;}
for(int n: a){System.out.println(n);}

Answer 1

This happens inside enhanced for loop:

{1,2,3,4,1}

n=1
a[1]=0 {1,0,3,4,1}

n=0
a[0]=0 {0,0,3,4,1}

n=3
a[3]=0 {0,0,3,0,1}

n=0
a[0]=0 {0,0,3,0,1}

n=1
a[1]=0 {0,0,3,0,1}