Loop concepts in python with break and continue statement !

Question

In this article you will learn  Basic Loop concepts in python.  For loop and  While loop with   Break , Continue and Pass statements.

Comments

Great study material.

Answer 1

 Loops in Python

Python provides different types of loop in python programming. 

• for loop
• while loop
• nested loops 

for loop in python

For loops iterate over a given sequence.In sequence either (dictionary, tuple, set, list and string ) 

for loop syntax (for variable in sequence or range)

for loop concept

Examples

#For loop in list  

color_list=['red','green','white','purple','pink','marron']

for i in color_list:

   print(i)

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#For loop in string 

fr_string="Goeduhub technologies"

for i in fr_string:

    print(i)

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#For loop in dictionary 

fr_dict={1:'q',2:'w',3:'e',4:"r"}

for i in fr_dict:

    print(i)

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#Sum of all the list elements 

Num=[1,2,3,4,5,6,7,8,9,10]

Sum=0

for i in Num:

    Sum=Sum+i

print(Sum)

Output

red green white purple pink marron

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G

o e d u h u b t e c h n o l o g i e s

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1 2 3 4

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55

For loop with range()  Function

range() syntax

range(a) - Generates a sequence started from 0 to a , where a is excluded 

range(a,b)- Generates a sequence started from a ,end at b , where b is excluded 

range(a,b,c)- Generates a sequence started from a, end at (b-1) and c is difference (steps) 

Note:-By default range() function take difference of 1, if difference is not given.

Example

color_list=['red','green','white','purple','pink','marron']

for i in range(len(color_list)):

print(color_list[i])

---

s=0

for i in range(1,14,3):

    print(i)

    s=s+i

print("sum is =",s)

Output

red green white purple pink marron

---

1

4

7 10 13 

sum is= 35

For loop with else statement

Example

for i in range(5):

    print(i)

else:

    print("Finally finished!")

Output

0 1 2 3 4

 Finally finished!

Nested for loop

color_list=['red','green','white']

for i in range(2):

    for j in color_list:

           print(i,j)

Output

0 red 0 green 0 white 1 red 1 green 1 white

While Loop in python

While loop also work like for loop and iterate a sequence , with a condition.

Python while loop concept flow chart 

Syntax of while loop 

while expression or condition:
   statement(s)

Example

n=int(input("A Number ="))

i=0

while i <=n:

    i=i+1

    s=i+n

print(s)

Output

A Number =4 5 6 7 8 

9 

Loop control statements

Pass statement-If we have empty for  loop , put in the pass statement to avoid getting an error.

Continue statement- 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. 

Break statement- Terminates the loop statement. 

While loop with break statement 

Example

n=int(input("A Number ="))

b=5

i=0

while i <=n:

    i=i+1

    if i>b:

        break

print(i)

Output

A Number =10 

1 2 3 4 

5 

While loop with continue statement

 num=int(input("Num value="))                    

while num > 0:              

    num = num -1

    if num == 3:

        continue

        print(num)

    print ('Number=', num)

Output 

Num value=4 

Number= 2 

Number= 1 

Number= 0 

For loop with break statement 

Example

List =[1,5,6,8,77,9,6,2.,7]

for i in List:

    if i==77:

        break

    print(i)

Output

1 5 6 8

For loop with continue statement 

List =[1,5,6,8,77,9,6,2,7] 

for i in List: 

 if i==77: 

     continue 

print(i)

Output

1 5 6 8 9 6 2 

7

For loop with pass statement 

numbers = [ 1, 2, 4, 3, 6, 5, 7,8, 9,10,11,12,13,14,15,16 ]

for number in numbers:

    if number % 2 == 0:

        pass

    else:

        print (number)

Output 

1 3 5 7 9 11 13 

15 

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Comments

good study website

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in this chapter i have learned loop in python like as for,while  and nested loop.

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21-04-2020,
In this module i have learned about loops in paython with their example and syntax.

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# the following code not works properly with input { 1.11,1.12,1.13,1.14} Why
n=float(input("Enter n "))
i=int(n)
while n!=i:
  n*=10
  i=int(n)
print("Number Without Decimal Point ",i)

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In this module ,I have studied about different loops in python like ,for loop (for loop with different conditions),while loop and nested loops.

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if there is float value

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Loops are explained in detail.

---

In  this chapter I learned python loops
Like as for,while and nested loop.
And also learned how it's implement

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@Manish Your Program can be written like this...this will work for all cases...
# the following code not works properly with input { 1.11,1.12,1.13,1.14} Why
n=float(input("Enter n "))
str1=str(n)
list1=str1.split('.')
d=len(list1[1])
n1=round(n,d)
i=int(n)
n2=n1
while n2!=i:
  n1*=10
  n2=round(n1,d)
  i=int(n2)
  print("i=",i,"n=",n2)
print("Number Without Decimal Point ",i)

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In this section we learn about loops-
For loop
While loop
Nested loop
And with different different statements.

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In this article, i learned about python loops. Syntax for while and for loops, range function, break, continue, pass statements. This article contains a good theory about loops and their uses.

Answer 2

21/04/2020

Topic: Python Loops

The python loops has different types which has different uses. When i have few condition which are in orders i can use loops. It must code with range () function and i also learn three statements and how they get you different outcomes.

Answer 3

Date:- 22/04/2020          module:- loops in python

In this module i have study about basic loop concept in python and i have study about for loop ,while loop with break , pass and continue statement also. Now i know how loops work and how we can apply.

Thank you !

Answer 4

in this module i learned learn  Basic Loop concepts in python.  For loop and  While loop with   Break , Continue and Pass statements.