流程控制规则
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@if控制是否评估块。¥
@ifcontrols whether or not a block is evaluated. -
@each评估 列表 中的每个元素或 映射 中的每对元素的块。¥
@eachevaluates a block for each element in a list or each pair in a map. -
@for对块进行一定次数的评估。¥
@forevaluates a block a certain number of times. -
@while评估块直到满足特定条件。¥
@whileevaluates a block until a certain condition is met.