break and continue Python | Python Tutorials

Python Break and Continue

The Break Statement

Normally a while loop ends only when the test condition in the loop becomes false.
However , with the help of a break statement a while loop can be left prematurely

while test expression:
    body of while
    if condition:
        break
    body of while
    statement(s)

Now comes the crucial point:
If a loop is left by break then the else part is not executed.

Example:

    
i=1

while i<=10:

    if(i==5):

        break

    print(i)

    i=i+1

else:   

    print("bye")

Output:

Exercise:

You have to develop a number guessing game. The program will generate a random integer secretly. Now it will ask the user to guess that number . If the user guessed it correctly then the program prints “Congratulations! You guessed it right” .
If the number guessed by the user is larger than the secret number then program should print “Number too large” and , if the number guessed by the user is smaller than the secret number then program should print “Number too small” .
This should continue until the user guesses the number correctly or quits . If the user wants to quit in between he will have to type 0 or negative number

In Python , we have a module named random
. This module contains a function called randint() , which accepts 2 arguments and returns a random number between them.

    
import random

a=random.randint(1,20)

print("Random number is",a)

Output:


    Random number is 16

Solution:

    
import random

secretno=random.randint(1,100)

guess=secretno+1

while guess!=secretno:

    guess=int(input("Guess the secret number:"))

    if(guess<=0):

        print("So Sorry! That you are quitting!")

        break;

    elif(guess>secretno):

        print("Your guess is too large. Try again!")

    elif(guess"secretno):

        print("Your guess is too small. Try again!")

    else:

        print("Congratulations! You guessed it right!")

The Continue Statement

The continue statement in Python returns the control to the beginning of the while loop.
It rejects all the remaining statements in the current iteration of the loop and moves the control back to the top of the loop.

    
while test expression:
    #code inside while loop
    if condition:
        continue
    #code inside while loop
#code outside while loop

Example:


i=0

while i<10:

    i=i+1

    if(i%2!=0):

        continue

    print(i)

Output: