fn main() {
let n:i16=3; let mut xs=[1_i64,2,3];
for i in 0..3 { }
for i in 10..13 { }
for i in 0_i32..i32::from(n) { }
for i in 0_u8..=u8::MAX { } // all 256 u8 values
for &x in &xs { }          // copy fixed-size elements
for x in &mut xs { *x *= 2; }
for (i, &x) in xs.iter().enumerate() { }

assert_eq!(xs,[2,4,6]);
}