// これまでの関数 var fnc = function(a, b) { return a + b; }; document.write(fnc(2, 3) + "<br>"); // アロー関数1 var arrow1 = (a, b) => { return a + b; }; document.write(arrow1(3, 4) + "<br>"); // アロー関数2(処理がreturnだけなら、省略可能) var arrow2 = (a, b) => a + b; document.write(arrow2(4, 5) + "<br>");
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