!

[Boolean Operators]

描述

Logical NOT results in a true if the operand is false and vice versa.

範例程式碼

This operator can be used inside the condition of an if statement.

if (!x) { // if x is not true
  // statements
}

It can be used to invert the boolean value.

x = !y; // the inverted value of y is stored in x

Tip

The bitwise not ~ (tilde) looks much different than the boolean not ! (exclamation point or “bang” as the programmers say) but you still have to be sure which one you want where.

參考

• [程式語法] ~ Bitwise NOT

語法參考主頁面

86Duino 參考的文本是根據 Creative Commons Attribution-ShareAlike 3.0 License，部分文本是從 the Arduino reference 修改的。 參考中的代碼示例已發佈到公共領域。