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    3. javascript if...else

    javascript if...else

    xiaoxiao2021-03-25  94

    1.if…else…

    <!DOCTYPE html> <html> <head> <meta charest = "utf-8"> <title>多分支循环</title> <script tpye = "text/javascript"> var answer = window.prompt("你看春晚了么？"); if(answer === "yes")//a { window.alert("me too");//b }else { window.alert("你居然不看");//c } </script> </head> </html>

    解释说明:如果a为真,执行b,否则执行c

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