1e crashes with java.lang.NumberFormatException: For input string: ""

[vanniktech]

I'd expect 1e to print 2.71828182846 instead I'm getting an exception:

java.lang.NumberFormatException: For input string: ""
    at java.lang.Integer.parseInt(Integer.java:627)
    at java.lang.Integer.parseInt(Integer.java:650)
    at java.math.BigDecimal.<init>(BigDecimal.java:336)
    at java.math.BigDecimal.<init>(BigDecimal.java:444)
    at com.udojava.evalex.Expression$59.eval(Expression.java:1363)
    at com.udojava.evalex.Expression.eval(Expression.java:1398)
    at com.udojava.evalex.Expression.eval(Expression.java:1273)

[RobertZenz]

There is no implicit multiplication, you have to specify a multiplication. See #64.

[vanniktech]

My problem is similar to the one from @flashtek. The input is coming from a user and he'd expect it to be multiplied.

E.g. What about A5BSIN(2) - is this a function named A5BSIN or an expression A5SIN(2) ?

If a function with a name A5BSIN is defined then it should take precedence. Otherwise A*5*SIN(2) as long as A can be satisfied. If none can then it can crash.

[vanniktech]

The same should be applied for 1π where PI is defined as .setVariable("π", Expression.PI).