Keyboard shortcuts

Press or to navigate between chapters

Press S or / to search in the book

Press ? to show this help

Press Esc to hide this help

for 迴圈

Rust 中有三個迴圈關鍵字:whileloopfor

while

while 關鍵字的運作方式與其他語言非常相似:

fn main() {
    let mut x = 200;
    while x >= 10 {
        x = x / 2;
    }
    println!("Final x: {x}");
}