In ORCHESTRA input files you an use (nested) loops to vary the value of input variables:

Var: pH
Default: 7

Sweep: 11
   Swept: pH 2 12 lin
}

• The loop starts with “Sweep: <number>” and ends with “}”
• Each variable that is varied in this loop “Swept: <name> <start> <end> <lin/log>”
• Loop variables need to be defined in the “Var:” line before the loop
• Each Sweep: can contain any number Swept variables and/or (sub) Sweeps.

Var:      pH  pe  Ca+2.con
Default:  7   7    1e-3

Sweep: 11
   Swept: pH 2 12 lin
   Swept: pe 12 2 lin

   Sweep: 6
      Swept: Ca+2.con 1e-7 1e-2 log
   }  
}