View Compilation Error

0_0_39608599_7785.c: In function 'main':
0_0_39608599_7785.c:13:25: error: 'i' undeclared (first use in this function)
   13 |         scanf("%d",&arr[i]);
      |                         ^
0_0_39608599_7785.c:13:25: note: each undeclared identifier is reported only once for each function it appears in