The condition num! = 65 cannot be replaced by:

Correct option is D

Given:
The condition num ≠ 65 needs to be evaluated. We are to identify the expression that cannot replace this condition.
Step 1: Analyze Each Option
1. Option (a): num > 65 || num < 65:
· This condition states that num is either greater than 65 or less than 65.
· This logically covers all cases except num = 65, hence it is equivalent to num ≠ 65.
· Valid replacement.
2. Option (b): !(num == 65):
· This negates the condition num == 65, which means num ≠ 65.
· This is equivalent to num ≠ 65.
· Valid replacement.
3. Option (c): num − 65:
· The subtraction num – 65 evaluates to 0 only when num = 65.
· When num ≠ 65, this evaluates to a non-zero value, implying num ≠ 65.
· While unconventional, it is logically valid to represent num ≠ 65.
· Valid replacement.
4. Option (d): (num − 65):
· This is simply a numerical expression and does not directly evaluate to a boolean condition.
· It does not convey the logical check for num ≠ 65.
· Not a valid replacement.
Step 2: Conclusion
The condition num ≠ 65 cannot be replaced by Option (d) (num − 65), as it does not perform a logical evaluation.
Information Booster:
1. Boolean Logic in Programming:
· Conditions like num ≠ 65 evaluate to true or false in programming.
· Logical operators (||, &&, !) simplify complex expressions.
2. Valid Replacements: Use expressions that evaluate explicitly to boolean values for logical checks.
Additional Knowledge:
· Using numerical expressions without relational operators can lead to ambiguity.
· Ensure expressions match the intended logical evaluation for better code readability and maintainability.