ForLoop.md

ForLoop

In Yul, there is only a for loop, and no while loop, however, we can rewrite a for loop to match a while loop.

for { let i := 0 } lt(i, 10) { i := add(i, 1) }

Is the Yul way of writing:

for (i = 0; i < 10; i++)

While Loop Imitation

Source: http://rb.gy/4narf.

assembly {
    let x := 0
    let i := 0
    for { } lt(i, 0x100) { } {   // while(i < 256), 100 (hex) = 256
        x := add(x, mload(i))
        i := add(i, 0x20)
    }
}