A simple test follows:
${message}
Start with the increment operator:
a1 = ${a1}
a1 = ${a1}
a1 = ${a1}
Now the decrement operator:
a2 = ${a2}
a2 = ${a2}
a2 = ${a2}
a2 = ${a2}
a2 = ${a2}
a2 = ${a2}
a2 = ${a2}
Now the add operator:
op1 = ${op1}, op2 = ${op2}, op3 = ${op3}
op3 = ${op3}
And the subtract operator:
op1 = ${op1}, op2 = ${op2}, op3 = ${op3}
op3 = ${op3}
The comparison operators:
Item is: ${item}
Item is less than five.
Item is less than or equals to seven.
Item is greater than two.
Item is greater than or equal to ten.