\begin{datadesc}{ps1}
\dataline{ps2}
+\index{interpreter prompts}
+\index{prompts, interpreter}
Strings specifying the primary and secondary prompt of the
interpreter. These are only defined if the interpreter is in
interactive mode. Their initial values in this case are
\begin{datadesc}{ps1}
\dataline{ps2}
+\index{interpreter prompts}
+\index{prompts, interpreter}
Strings specifying the primary and secondary prompt of the
interpreter. These are only defined if the interpreter is in
interactive mode. Their initial values in this case are