The Body Of A Do-While Loop Always Executes At Least Once

True Or False: 1) The Body Of A Do-While Loop Always Executes At Least Once. 2) The Body Of A While Loop May Never Execute. 3) The Opposite Of (X >3 && X< 10)=”” is=”” (x=””>< 3=”” &&=”” x=””> 10) 4) The Integer 0 Is Considered True. 5) It Is Legal To Declare More Than One Variable In A Single Statement. 6) Variable Names May Begin With A Number. 7) The Opposite Of Less Than

The Correct Answer and Explanation is:

Let’s evaluate each of the 7 statements and determine whether they are True or False, followed by a detailed explanation.

✅ 1) The body of a do-while loop always executes at least once.

✔️True
Explanation:
In a do-while loop, the syntax ensures that the loop body executes before the condition is checked. This guarantees that the block inside the do executes at least once, regardless of whether the condition is true or false.
Example:

int i = 5;
do {
   cout << i;
} while (i < 3);  // Still prints 5 once even though i < 3 is false

✅ 2) The body of a while loop may never execute.

✔️True
Explanation:
In a while loop, the condition is checked before the loop body executes. If the condition is initially false, the loop body is skipped entirely.
Example:

int i = 5;
while (i < 3) {
   cout << i;
}
// Nothing prints because condition is false initially.

✅ 3) The opposite of (x > 3 && x < 10) is (x < 3 && x > 10).

❌False
Explanation:
The opposite of a compound condition using && is derived using De Morgan’s Law:

The opposite of (A && B) is !A || !B.

So:
!(x > 3 && x < 10) → (x <= 3 || x >= 10)
(x < 3 && x > 10) is logically impossible (no number can be both less than 3 and greater than 10).

✅ 4) The integer 0 is considered true.

❌False
Explanation:
In C, C++, and many other languages, 0 is considered false, and any non-zero value is true. This is fundamental to how Boolean logic works in these languages.

✅ 5) It is legal to declare more than one variable in a single statement.

✔️True
Explanation:
Yes, multiple variables can be declared in one line:

int a = 5, b = 10, c;

✅ 6) Variable names may begin with a number.

❌False
Explanation:
In most programming languages, variable names must not start with a digit. They must start with a letter (A-Z or a-z) or an underscore _.

✅ 7) The opposite of less than is greater than.

❌False
Explanation:
The opposite of less than (<) is greater than or equal to (>=), not just greater than (>).
Example:
If x < 5 is false, it means x >= 5.

✅ Summary of Answers:

True
True
False
False
True
False
False