我正在使用包\usepackage{algpseudocode}来\usepackage{algorithm}运行下面的算法，但是它出现错误！
未定义控制序列。l.1248 \如果 $f(X_{i})$ 优于 $f(X_{k})$？
请告诉我问题是什么？
\begin{algorithm}%[h]
\caption{GTLBO}
\begin{algorithmic}[1]
\State initialize no of students, no of subjects i.e., variables, termination criteria
\State Calculate the mean of each variable or subjects
\State Find the best solution and best variable value
\While Stopping condition not met
\For {for each learner X, of the class} %Teaching phase}
\State $TeachingPhase=round(1+rand(0, I))$
\For j=1:D
\State $newX_{ij} = X_{ij} + rand(0, 1) \ast (Teacher(j)-TeachingPhase \ast Mean(j)$
\EndFor
\State Accept $newX_{i} if f(newX_{i}) is better than f(X_{i})$
\EndFor
\For each learner $X_{i}$ of the class % Learning phase
\State Randomly select one learner $X_{k}$, such that $i \neq k$
\IF $f(X_{i})$ better $f(X_{k})$
\For $j= 1:D$
\State $newX_{ij} =X_{ij}+rand(0, 1) \ast (X_{ij}-X_{kj})$
\EndFor
\Else
\For $j= 1:D$
\State $newX_{ij}$ = $X_{ij}$+rand(0, 1) $\ast$ $(X_{kj}-X_{ij})$
\Endfor
\EndIF
\State Accept $newX_{i}$ if $f(newX_{i})$ is better than $f(X_{i})$
\EndFor
\State Update the Teacher and the Mean
\EndWhile
\End
\end{algorithmic}
\end{algorithm}