A simple test follows:
${message}
Start with the increment operator:
<#assign a1 = 0>a1 = ${a1}
<#assign a1 = a1 + 1>a1 = ${a1}
<#assign a1 = a1 + 1>a1 = ${a1}
Now the decrement operator:
<#assign a2 = 5>a2 = ${a2}
<#assign a2 = a2 - 1>a2 = ${a2}
<#assign a2 = a2 - 1>a2 = ${a2}
<#assign a2 = a2 - 1>a2 = ${a2}
<#assign a2 = a2 - 1>a2 = ${a2}
<#assign a2 = a2 - 1>a2 = ${a2}
<#assign a2 = a2 - 1>a2 = ${a2}
<#assign a2 = a2 - 1>Now the add operator:
<#assign op1 = 5> <#assign op2 = 3> <#assign op3 = op1 + op2>op1 = ${op1}, op2 = ${op2}, op3 = ${op3}
<#assign op3 = op3 + op2>op3 = ${op3}
And the subtract operator:
<#assign op3 = op1 - op2 >op1 = ${op1}, op2 = ${op2}, op3 = ${op3}
<#assign op3 = op3 - op2 >op3 = ${op3}
The comparison operators:
<#assign list1 = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]> <#foreach item in list1>Item is: ${item}
<#if item lt 5>Item is less than five.
#if> <#if item <= 7>Item is less than or equals to seven.
#if> <#if item gt 2>Item is greater than two.
#if> <#if (item >= 10)>Item is greater than or equal to ten.
#if> #foreach>