Which general while loop definition is correct?

The correct definition of a while loop is structured as "while (condition) { //code }". This form follows the syntax rules used in many programming languages, including C, C++, Java, and others, where the while loop begins with the keyword "while" followed by a condition enclosed in parentheses. The curly braces are used to contain the block of code that should be executed repeatedly as long as the specified condition evaluates to true.

Using parentheses around the condition is crucial because it clearly defines the condition that the loop checks before each iteration. If the condition is true, the code inside the braces will be executed. Once the condition becomes false, the loop terminates, and the program continues executing the code that follows the loop.

In the other choices, the syntax does not conform to the standard definitions required in those programming languages. For example, omitting parentheses or using brackets incorrectly can lead to syntax errors or unintended behavior when the code is executed. Thus, the choice that includes the correct syntax with the necessary parentheses and braces accurately reflects how while loops are defined and implemented in widely-used programming languages.