Loops

While 语句

while denotes a loop that iterates as long as its given condition evaluates as true:

let counter = 5;
while counter {
    let counter -= 1;
}

Loop 语句

除了 while, loop 还可用于创建无限循环:

let n = 40;
loop {
    let n -= 2;
    if n % 5 == 0 { break; }
    echo x, "\n";
}

For 语句

for 是一种控制结构, 允许遍历数组或字符串:

for item in ["a", "b", "c", "d"] {
    echo item, "\n";
}

可以通过为键和值提供变量来获取哈希中的键：

let items = ["a": 1, "b": 2, "c": 3, "d": 4];

for key, value in items {
    echo key, " ", value, "\n";
}

还可以指示` for </ 0>循环以相反的顺序遍历数组或字符串：</p>

let items = [1, 2, 3, 4, 5];
for value in reverse items {    echo value, "\n";}`</pre>
` for </ 0>循环可用于遍历字符串变量：</p>

for ch in language {    echo "[", ch ,"]";}`</pre>

按相反顺序：

string language = "zephir"; char ch;

for ch in reverse language {

    echo "[", ch ,"]";

}

遍历一系列整数值

for i in range(1, 10) {

    echo i, "\n";

}

要避免对未使用的变量发出警告，可以在for

使用键, 但忽略该值

for key, _ in data {    echo key, "\n";}`</pre>

Break 语句break
while
for
loop

for item in ["a", "b", "c", "d"] {

    if item == "c" {

        break; // exit the for

    }

    echo item, "\n";

}

Continue 语句在循环结构中使用 continue

let a = 5;

while a > 0 {

    let a--;

    if a == 3 {

        continue;

    }

    echo a, "\n";

}