the answer shows 6, can anyone explain me that " sum+=*(a+i); " part???

Question

int i,sum=0;
int a[]= {1,2,3,4};
for(i=1; i<4; i+=2){
sum+=*(a+i);
}

Answer 1

An array name is a pointer to its first element and when you add i to a you are going forward in the array so *(a+i) equals a[i]

Answer 2

Rajesh Dutta, *(a) is a pointer to the first element of the array a[]. Likewise, *(a + 1) points to the second element, *(a + 2) to the third and so on. The for loop iterates from i = 1 to i = 3. *(a + 1) = 2 and *(a + 3) = 4.
sum += *(a + 1) ==> sum += 2 (which makes sum = 2) and
sum += *(a + 3) ==> sum += 4 (which makes sum = 6)

Answer 3

thanks David Akhihiero GHOST mHBr