Considering the following code segment:

if (num <0) {

alert ("It's a negative num.");

}

else {

alert ("It's a non-negative num.");

}

What will be displayed if num=0?

It's a positive num.

It's a non-negative num.

It's a zero.

Nothing will be displayed.

It's a non-negative num.

Explanation:

As the value of num=0 is given in the input. First it will check "if (num<0) " condition,

here this condition false. Then it will check "else" condition and give an alert as

"It's a non-negative num.". In there is "if-else" condition given, only one of them

will be executed based on their TRUE value.