What will be the value of the variable string after the following code executes?
String = 'Hello'
String += ' world!'
A) 'Hello'
B) ' world!'
C) 'Hello world!'
D) Nothing; this code is invalid

Question

Quizplus · Accepted Answer

The code initializes the variable 'String' with the value 'Hello'. Then, the concatenation assignment operator '+= ' is used to add the string ' world!' to the previous value which modifies the value of String to be 'Hello world!'. Therefore, the correct answer is C, 'Hello world!'.

What Will Be the Value of the Variable String After