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the inverse of if statement

the inverse of if statement

(OP)
Can anyone help with the exact reverse of the following line. I tried inserting Not ! but i think I must be putting it in wrong place.

if (email.indexOf("@") < 1 || email.lastIndexOf(".") < email.indexOf("@") + 2 || email.lastIndexOf(".") + 2 >= email.length) {
alert ("I need this to show when the exact opposite of the if statement occurs")
}

Any help would be much appreciated
Thank you

RE: the inverse of if statement

(OP)
Found a way to do it using De Morgan's Law

RE: the inverse of if statement

You can check boolean operators here

In your case, adding some parentheses, would be something like

CODE

if (!((email.indexOf("@") < 1) || (email.lastIndexOf(".") < email.indexOf("@") + 2) || (email.lastIndexOf(".") + 2 >= email.length))) {
alert ("I need this to show when the exact opposite of the if statement occurs")
} 

Cheers,
Dian

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