Python decision making_loops_control statements part8

Prof. Neeraj Bhargava
Vishal Dutt
Department of Computer Science, School of
Engineering & System Sciences
MDS University, Ajmer

break statement
• It terminates the current loop and resumes
execution at the next statement, just like the
traditional break statement in C.
• The most common use for break is when some
external condition is triggered requiring a hasty
exit from a 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.

Example
for letter in 'Python': # First Example
if letter == 'h':
break
print 'Current Letter :', letter
var = 10 # Second Example
while var > 0:
print 'Current variable value :', var
var = var -1
if var == 5:
break
print "Good bye!"

Output
Current Letter : P
Current Letter : y
Current Letter : t
Current variable value : 10
Good bye!

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.
 The continue statement can be used in
both while and for loops.

Example
for letter in 'Python': # First Example
if letter == 'h':
continue
var = 10 # Second Example
while var > 0:
var = var -1
if var == 5:
continue
print 'Current variable value :', var
print "Good bye!"

Output
Current Letter : P
Current Letter : y
Current Letter : t
Current Letter : o
Current Letter : n
Good bye!

pass Statement
 It is used when a statement is required syntactically
but you do not want any command or code to execute.
 The pass statement is a null operation; nothing
happens when it executes. The pass is also useful in
places where your code will eventually go, but has not
been written yet (e.g., in stubs for example) −
Syntax
pass

Example
for letter in 'Python':
if letter == 'h':
pass
print 'This is pass block'
print "Good bye!"
#Output
Current Letter : P
Current Letter : y
Current Letter : t
This is pass block
Current Letter : h
Current Letter : o
Current Letter : n
Good bye!

Questions
 Explain break statement with example?
 Explain continue statement with example?
 Explain pass statement with example?

Python decision making_loops_control statements part8

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