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There are three variables as follows
var a=1;
var b=-2;
var c=4;
If I performed following options
var Res=a*b*c;
Or
var Res=a+b+c;
然后,如果结果是一个-ve值显示 - 在警告框,如果结果是+已经 值显示+在警告框如何显示+和 - 警告框标志在JavaScript