電腦程式設計中,空白字元是指一個代表空位的字元。人們在鍵盤上按下spacebar後就會產生空白字元。在鍵盤上按下Tab ↹鍵後輸入的則是水平的空白字元,不過兩者之間輸入的空格的長度可能會有所不同。人們按下↵ Enter後輸入的則是垂直的空白字元[1]

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