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&&
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Looks at 2 expressions & returns a value of "true" if the expressions on the left & right of the operator are both true
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If day = 'friday' && date=13 then alert("do You believe in astrology?") Compares the value of the day and the date. If it is true that today is
a Friday and if it is also true that the date is the 13th, then an alert box pops up with the message "Are You believe in astrology?"
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||
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Looks at two expressions & returns a value of "true" if either one -- although not both -- of the expressions are true.
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if day='friday'&&date=13 then alert("do you believe in astrology?") else if day='friday'||date=13 then alert("Aren't you glad it isn't Friday the 13th?") Compares the value of the day & the value of the date. If it is true that today is a Friday & if it is also true that the date
is the 13th, then an alert box pops up with
the message " do You believe in astrology?" If both are not true, the script moves onto the next line of code... Which compares the value of the day & the value of the date? If either one -- however not both -- is true, then an alert box pops up with the message "Aren't you glad it isn't Friday the 13th?"
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