[ intconst | realconst | logconst | strconst | iarray | rarray | sarray ]

• integers: -9999 12
• reals: 12.0 -0.00003 2.
• logicals: yes no
• strings: "I see M", "Backslash (\\) and quote (\")" "line1\nline2" Escape sequences which can be used inside strings:

   
  \a - bell 
  \b - backspace 
  \f - formfeed 
  \n - newline 
  \r - carriage return 
  \t - horizontal tab 
  \v - vertical tab 
  \\ - backslash 
  \" - double quote 
  

• integer arrays: {2, -1, 6, 0} {-8, -1, 2} The comma is compulsory before a negative number, it can be skipped otherwise. See also: read iarray.
• real array: { -1.6 , 2.150 3., -160.} See also: read rarray
• string arrays: {"do","re","mi","fa","sol"} {"\n(newline), \t (tab)","\a (bell)"} See also: read sarray
• selections (find a detailed description below):

 
 a_hiv?.  a_1,2.  a_*.           # objects 
 a_h*.a   a_m1    a_*.!w2,w15,z* # molecules 
 a_1.*/2:15,18:26 a_/18,his*     # residues 
 a_//ca,c,n a_1.c a_/2:4/!h*     # atoms 
 v_//phi,psi      V_2//?vt*      # variables