Need help with Perl, using perl 5 Exercise A3 What is the value of $x and $y aft

Question

Need help with Perl, using perl 5

Exercise A3

What is the value of $x and $y after the following statements?
$x = 4;
$x++;
$y += $x + 3;

Exercise A4

Which of the following expressions evaluate to true, and which evaluate to false?

4 < "23A"

-14 < "-13"

"14" != 14

0 >= "AB"

Exercise A5

What is the value of each of the following expressions?

1 <=> 7

2 <=> "H"

4 cmp 7

"4" <=> undef

Exercise A6

Which of the following expressions evaluate to true, and which evaluate to false?

"Hi" && 2

"Hi" || 2

"00" && 4

"00" || "0"

Exercise A7

The following statements set the values:

$x = 3;

$y = 0;

$z = -4;

Then, which of the following expressions evaluate to true, and which evaluate to false?

!( $x < $y ) = True

!( $x >= $y ) False

!( (4 + 5 * $y) >= $z -2 ) && ( $z - 2 )

!($x) && !($y) || !($z)

Exercise A8

Code a single statement, which uses the && operator, and produces the same results as this code:

if ( $x < 10 )

    {

    $x++;

    }

Exercise A9

Code a single statement, which uses the || operator, and produces the same results as this code:

unless ( $x < 10 )

    {

    $x++;

    }

Explanation / Answer

Hi friend, I have answered firs four.

Please repost others in separate post.

$x = 4;
$x++; // incrementing x by 1, x = 5
$y += $x + 3; // y = x + 3 , 5 + 3 = 8

Ans: x = 5, y = 8

== operator of Perl converts the string to a number.
4 < "23A" : False
-14 < "-13" : False
"14" != 14 : False
0 >= "AB" : True

op1 <=> op2 this operator returns 1 if op1 is greater than op2, 0 if op1 equals op2, and -1 if op1 is less than op2.

1 <=> 7 : -1
2 <=> "H" : 1
4 cmp 7 : -1
"4" <=> undef : 1

"Hi" && 2 : True
"Hi" || 2 : True
"00" && 4 : True
"00" || "0" : True

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