The increment (++) and decrement (---) operators should be avoided since it can lead to unexpected results. Here are some of the conditions −
Example
In an assignment statement, it can lead to unfavorable results −
<html>
<body>
<script>
var a = 5;
var b = ++a;
var c = a++;
var d = ++c;
document.write(a);
document.write("\r"+b);
document.write("\r"+c);
document.write("\r"+d);
</script>
</body>
</html>Output
Whitespace between the operator and variable can also lead to unexpected results −
a = b = c = 1; ++a ; b -- ; c;