Page 149 - DCAP408_WEB_PROGRAMMING

Unit 5: Scripting Language

5.5 Operators Notes

Assignment Operator

The most common assignment operator is the equal sign. It sets one item equal to another.

Operator What does it do? Example/Explanation
= Sets one value equal to another counter=0
Sets the counter to equal the number 0
+= Shortcut for adding to the clicks += 2
current value. Sets the variable named counter to equal the current
value plus two.
-= Shortcut for subracting from clicks -= 2
the current value. Sets the variable named counter to equal the current
value minus two.
*= Shortcut for multiplying the clicks *= 2
current value. Sets the variable named counter to equal the current
value multiplied by two.
/= Shortcut for dividing the clicks /= 2
current value. Sets the variable named counter to equal the current
value divided by two.

Comparison Operator

The comparison operators compare two items and return a value of “true” if the conditions are
true.

Operator What does it do? Example/Explanation
== Returns a true value if the items are the counter==10 >
same Returns the value "true" if the counter's value
is currently equal to the number 10
Returns a true value if the items counter!=10
arenot the same Returns the value "true" if the counter's value
is any value except the number 10
> Returns a true value if the item on the counter>10
left is greater than the item on the right Returns the value "true" if the counter's value
is larger than the number 10
>= Returns a true value if the item on the counter>=10
left is equal to or greater than the item Returns the value "true" if the counter's value
on the right is equal to or larger than the number 10
< Returns a true value if the item on the counter<10
left is less than the item on the right Returns the value "true" if the counter's value
is smaller than the number 10
<= Returns a true value if the item on the counter<=10
left is equal to or less than the item on Returns the value "true" if the counter's value
the right is equal to or less than the number 10

LOVELY PROFESSIONAL UNIVERSITY 143