Question

Int w=5, t=9; t++; t=++w + t++

Answer 1

Answer:

The $\texttt{++}$ operator increases an integer variable by 1. It can only be used with integers. $\texttt{++x}$ increments $\tt{x}$ before anything. $\texttt{x++}$ increments $\tt{x}$ after statement.

$\texttt{++x}$ and $\texttt{x++}$ both add 1 to $\tt{i}$. However, $\texttt{++x}$ returns the new value, and $\texttt{x++}$ returns the old value.

We have been given $\tt{w = 5}$ and $\tt{t = 9}$, and we have been asked to find out the value of $\tt{t=++w + t++}$.

$\tt{\implies t = ++w + t++}$

$\tt{\implies t = ++5 + 9++}$

$\tt{\implies t = 6 + 10}$

$\therefore \; \boxed{\tt{t = 16}}$

Hence, the value/output of t is 16.

$\rule{100mm}{2pt}$

Notes:

• The $\texttt{++}$ and $\texttt{--}$ can only be used with Integers.
• These operators can also be used as postfixes like $\tt{n++}$ and $\tt{n--}$.