El Arithmetic Operators

Arithmetic Operators                

 Introcution:

The EL supports the following arithmetic operators.

1.    Addition +

2.    Subtraction –

3.    Multiplication *

4.    Division / and div

5.    Modulo division % and mod

Addition +  : ExpressionLanguage  doesn’t support operator overloading hence “+” operator always meant for arithmetic addition operator.

Ex:

1.     ${2+3}             Output:  5

2.    ${“2”+ ‘3’}       Output:  5

3.    ${“2” + ‘3’}      Output:  5

4.    ${abc+ ‘3’}       Output: 3

5.    ${null+ “3”}      Output:  3

6.    ${“abc” + “3”}  Output: NumberFormatException

7.    ${“abc” + “3”}  Output: NumberFormatException

Subtraction - :

All rules are exactly same as ‘+’  operator.

Ex:

1.     ${10-3}         Output :  7

2.     ${“abc”-3}    Output :  NumberFormatException.

3.    ${abc-3}        Output     3

Multiplication *  :

All rules are exactly similar  to  “+”  operator.

Ex:

1.      $ {10*3}        Output: 30

2.      ${“abc”*3}    Output:  NumberFormatException.

Division / and div :

All the rules are exactly same as ‘+’ operator.

Syntax: ${a/b} (or) ${a div b}

Ex:  

1. ${10/2}            Output : 5.0

2. ${10/0}           Output : Infinity

Note : Division operator always follows floating point arithmetic but not integral arithmetic.

System.out.println (10/0)    Output:  ArithmeticException / Zero

System.out.println (1.0/0)   Output : Infinity

System.out.println (0/0)      Output  :ArithmeticException

System.out.println (0/0.0)    Output  :NaN

Modulo division % and mod :

All the rules are exactly same as ‘+’ operator. 

And this operator can provide can support for both integral and floating point arithmetic.

Ex:   

1.     $ {10%3}      Output :   1     

2.    $ {10%0}      Output :   ArithmeticException

3.      $ {10.0%0}    Output :   NaN

Note:   /   à   Floating point Arithmetic.

          %   à   Integral & Floating point arithmetic.

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