What is the proper syntax to check if "$a" is greater than 4?

• A. $a > 4
• B. $a -gt 4
• C. if ($a > 4)
• D. check ($a > 4)

Answer: (B)

The choice indicating "$a -gt 4" is correct as it employs the appropriate comparison operator for numerical values in many programming and scripting languages, particularly in environments like PowerShell. The "-gt" operator stands for "greater than" and is specifically designed for numerical comparisons.

Using this syntax allows for clear and accurate evaluation of whether the variable $a holds a value that is greater than 4. This is especially relevant in scripting contexts where differentiating between numerical comparisons and string comparisons is crucial.

In contrast, stating "$a > 4" lacks the necessary context in some languages for numerical comparison, potentially leading to errors if $a is a string. The "if ($a > 4)" option is a conditional expression that doesn't directly show the proper syntax for the comparison operation itself but rather suggests the use of a condition in an if statement. The "check ($a > 4)" option does not represent any recognized syntax in common programming languages.