java - this while loop wont give me back the same as the for loop -


Can someone help me why loop does not have the same loop when doing the same? 

  public square hallowld {public static zero main (string [] args) {System.out.println ("Hello World"); Int bits = 0; Int data length = 8; Println (dataLength); For / * (int i = (int) (Math.pow (2, numCheckBits) -1); i & lt; datalength + bits; i ++) {numCheckBits = i; } * / While ((Math.pow (2, bits) - 1) & lt; datalength + bits) ++; Println (bits); }}    
 
 
 for  (int i = (int) (Math. pow) (2, numCheckBits) -1); I & lt; Data lang + bits; i ++) {numCheckBits = i;   
 When the loop starts,  i  2 is set to   numCheckBits   -1 Then again, every time Through the loop, this has increased by 1. Thus, if the value starts as  numCheckBits  0,  i , then the value will take to 1, 2, 3. ..,  data length + bit - 1 . Inside the loop, the  numCheckBits  resizing is  not  effect, because expression is calculated only at the beginning of the loop using  numCheckBits .  
  while ((Math.pow (2, bits) - 1) & lt; datalength + bits) ++;   
 In this case, the expression related to  Math.pow  is evaluated each time. This means that something like on  bits  0, 1, ... value (log  2   (data-bound + bits) ) or on values Takes .  Second  expression in the form of  Math.pow  in the loop  
  for loop which will be equal to your   So that the value will be tested against  dataLength + Bits  each time:  
 for  (int i = 0; Math.pow (2, I) -1 And lt; datalength + i; i ++) {}   
 [or whatever you want to do inside the loop - you  numCheckBits  any more].

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