[JSP] scriptlet, expression, EL(Expression Language) Tag

JSP scriptlet :

<% out.print(4+5); %>

 

JSP expression :

<%= 4+5 %>

 

EL(Expression Language) Tag :

${4+5}

 

[EL 사용 (예)]

Basic Arithmetic		Numeric		Alphabetic
EL Expression	Result	EL Expression	Result	EL Expression	Result
${1}	1	${1 < 2}	true	${'a' < 'b'}	true
${1 + 2}	3	${1 lt 2}	true	${'hip' > 'hit'}	false
${1.2 + 2.3}	3.5	${1 > (4/2)}	false	${'4' > 3}	true
${1.2E4 + 1.4}	12001.4	${1 gt (4/2)}	false
${-4 - 2}	-6	${4.0 >= 3}	true
${21 * 2}	42	${4.0 ge 3}	true
${3/4}	0.75	${4 <= 3}	false
${3 div 4}	0.75	${4 le 3}	false
${3/0}	Infinity	${100.0 == 100}	true
${10%4}	2	${100.0 eq 100}	true
${10 mod 4}	2	${(10*10) != 100}	false
${(2==2) ? 3 : 4}	3	${(10*10) ne 100}	false