Superplan
Superplan was a high-level programming language developed between 1949 and 1951 by Heinz Rutishauser, the name being a reference to "Rechenplan", in Konrad Zuse's terminology designating a single Plankalkül program.
The language was described in Rutishauser's 1951 publication Über automatische Rechenplanfertigung bei programmgesteuerten Rechenmaschinen.
Superplan introduced the keyword as for loop, which had the following form :
Für i=base''limit: + addend'' =