Bounded Linear Operator . What does it mean to say that , A bounded linear operator is  not "generally" bounded function. 
Can anybody explain ? 

A linear operator $T:V\to W$ is said to be "bounded" if there exists some $M\in\mathbb R$ such that $\|Tx\|\leq M\|x\|$ for all $x\in V$. A function $f:V\to W$ is said to be "bounded" if there exists some $M\in\mathbb R$ such that $\|f(x)\|\leq M$ for all $x\in V$. Note that this is a stronger condition than the previous one, as the upper bound for $\|T(x)\|$ varies with $x$ while the upper bound for $\|f(x)\|$ does not. In fact, any linear operator which is "bounded" as a function is simply $0$.
