x=1;while exp(x)<>%inf ; x=x+1;end /// \sleftarrow {\begin{minipage}[t]{5cm}{\nf{}a simple \verb+while+ with a scalar condition }\end{minipage}}
[exp(x-1),exp(x)]==%inf /// \sleftarrow{\normalfont checks result}

x=[1:3];while exp(x)<>%inf ; x=x+1;end /// \sleftarrow {\begin{minipage}[t]{5cm}{\nf{}a simple {while} with matrix condition}\end{minipage}}
exp(x)==%inf /// \sleftarrow{\normalfont one entry is \verb+%inf+}

x=1;
while %t /// \sleftarrow{\normalfont infinite loop, need a \verb+break+ to quit the \verb+while+}
  if exp(x)== %inf then  /// \sleftarrow{\normalfont quit the loop when \( \exp(x) \) equals \( \infty\)}
    break;
  end
  x=x+1;
end
[exp(x-1),exp(x)]==%inf /// \sleftarrow{\normalfont checks result}