webveuje/javascript/9.作用域.md

作用域

var color = "blue"; 
function changeColor(){ 
  if (color === "blue"){ 
  color = "red"; 
  } else { 
  color = "blue"; 
  } 
} 
changeColor(); 
alert("Color is now " + color);

特殊情况

• if
• for
• ...

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