Do
 Usage
• Do[expr, { }] evaluates expr  times.
• Do[expr, {i,  }] evaluates expr with the variable i successively taking on the values 1 through  (in steps of 1).
• Do[expr, {i,  ,  }] starts with i =  . Do[expr, {i,  ,  , di}] uses steps di.
• Do[expr, {i,  ,  }, {j,  ,  }, ... ] evaluates expr looping over different values of j, etc. for each i.
Notes
• Do uses the standard Mathematica iteration specification. • Do evaluates its arguments in a non-standard way (see Section A.4.2). • Unless an explicit Return is used, the value returned by Do is Null. • New in Version 1.
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