What will be the output of the following Java program?class output{public static void main(String args[]){StringBuffer c = new StringBuffer("Hello");StringBuffer c1 = new StringBuffer(" World");c.append(c1);System.out.println(c);}}

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What will be the output of the following Java program?
class output
{
public static void main(String args[])
{
StringBuffer c = new StringBuffer(“Hello”);
StringBuffer c1 = new StringBuffer(” World”);
c.append(c1);
System.out.println(c);
}
}

What will be the output of the following Java program?
class output
{
public static void main(String args[])
{
StringBuffer c = new StringBuffer(“Hello”);
StringBuffer c1 = new StringBuffer(” World”);
c.append(c1);
System.out.println(c);
}
}
a) Hello
b) World
c) Helloworld
d) Hello World

Answer: d
Explanation: append() method of class StringBuffer is used to concatenate the string representation to the end of invoking string.
Output:
Hello World

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What will be the output of the following Java program?class output{public static void main(String args[]){StringBuffer c = new StringBuffer(“Hello”);StringBuffer c1 = new StringBuffer(” World”);c.append(c1);System.out.println(c);}}

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What will be the output of the following Java program?
class output
{
public static void main(String args[])
{
StringBuffer c = new StringBuffer(“Hello”);
StringBuffer c1 = new StringBuffer(” World”);
c.append(c1);
System.out.println(c);
}
}