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A
aharkness1-Visitor
1-Visitor
March 21, 2017
Question

Question on Mathcad while loops

  • March 21, 2017
  • 3 replies
  • 1518 views

When I have a while loop that goes as long as x does not equal 1.0, then it does the operation x = x + .1. The result is an infinite while loop. Why does this happen

3 replies

A
AlanStevens19-Tanzanite
19-Tanzanite
March 21, 2017

Never test for exact equality using reals!  Always do a comparison along the lines of  |x - 1|<10^-6 .

xvals.PNG

Alan 

W
Werner_E25-Diamond I
25-Diamond I
March 21, 2017

Its better to have a worksheet to see what you actually did.

Maybe you ran into a accuracy problem. Not sure though.

F
Fred_Kohlhepp23-Emerald I
23-Emerald I
March 21, 2017

Maybe not :  "while x does not equal 1"

but rather:   " while x is less than 1"

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