Learnbay.Datascience (1)

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Transfer Statements

• In python, loop statements or transfer statements
   allows you to run the code block repeatedly. But
   sometimes you will need to exit the loop entirel
  y or skip the particular section of the loop when
   it reaches the specified condition. It can be acc
  omplished using the loop control mechanism. 
• In python, we have loop control statements can be
   used to alter or control the loop execution flow 
  depending on specified conditions.

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• The loop control statements supported by Python
  are
• break statementTerminates the loop statement
  and transfers execution to the statement
  immediately following the loop.
• continue statementCauses the loop to skip the
  remainder of its body and immediately retest its
  condition prior to reiterating.
• pass statementThe pass statement in Python is
  used when a statement is required syntactically
  but you do not want any command or code to
  execute.

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Break statement

• The break statement terminates the loop
  containing it. Control of the program flows to
  the statement immediately after the body of the
  loop.
• The break statement can be used in
  both while and for loops.
• If you are using nested loops, the break
  statement stops the execution of the innermost
  loop and start executing the next line of code
  after the block.
• Syntaxbreak

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Flow Chart
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Example

• for i in range(10)  if i  7         break
      else         print(i)
• O/P0 12 3 45 6

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Continue Statement

• It returns the control to the beginning of the
  while loop.
• The continue statement rejects all the remaining
  statements in the current iteration of the loop
  and moves the control back to the top of the
  loop.
• Continue statement forces the loop to continue or
  execute the next iteration. When the continue
  statement is executed in the loop, the code
  inside the loop following the continue statement
  will be skipped and the next iteration of the
  loop will begin.
• The continue statement can be used in
  both while and for loops.
• Syntax continue

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Flow diagram
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Example

• for i in range(10)    if i 7 or i  4
•          continue    else
•          print(i)
• O/P0 1 2 3 5 6 8 9

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Pass statement

• As the name suggests, the pass statement actually 
  doesn't do anything. The Python Pass statement is
   used when a statement is required syntactically, 
  but you do not want any command or code to be exe
  cuted. 
• It's like zero operation, because nothing happens 
  when it's executed. 
• Pass statement can also be used to write empty lo
  ops. Pass is also used for empty control statement
  s, functions and classes.
• It is used to write boilerplate code.
• Syntax pass

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Flow chart
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Example-pass boilerplate code

• for i in range(10)    passdef f1()
•      pass
•  var  0while var lt 100     pass
•    var  1print(i)
• O/P9

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