What is the result of concatenating "hello" and "World" using the '+' operator?

When concatenating the strings "hello" and "World" using the '+' operator in most programming languages, the result is "helloWorld". This outcome occurs because the '+' operator combines the two strings directly without any spaces or additional characters between them. The first string, "hello", is simply placed next to the second string, "World", forming a single string output.

In the context of the provided choices, "HelloWorld" may appear as an option, but it's important to note the casing of the output. The correct case for the concatenated result should maintain the original casing of the input strings, thus leading to lowercase 'h' in "hello" followed by uppercase 'W' in "World". Therefore, the accurate concatenated string is "helloWorld". The capitalization and spacing must be free from alterations, which is sometimes overlooked in option selections.