Array In Python | Python Tutorial in Hindi | Day 4 | Naveen Sir

Array In Python | Python Tutorial in Hindi | Day 4 | Naveen Sir
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while :
repeat the task at any number of time..

syntax :
while text_expression:
body of statement;

rule :
1. variable start
2. condition
3. inc/dec

Example:
find the sum of first n natural number ?
Task :
input a number then find the sum of its digit ?
input : 123
output : 6

123 .............
3
12

2
1

1
0

123 // 10 . ................ 12
123 % 10 ........... 3

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Array in python....

* it is the collection of same type of data element..
* it used to handle the large volume of data..
* array element represanted by its index value...
* index value of array start from 0 to n-1 ,.... n is the size of array..
* we import array module... ( module is a library )

ex : 10,20,24,21
a= 10
b= 20
c=24
d=21
e = a+b+c+d
print(e)

let us suppose if i am having 5000 numbers ? then what to do ?

Example : 10,20,24,21

program : display all the odd numbers ?

from array import *

rno = array('i',[10,19,24,21])

for n in rno:
if n%2==1:
print(n)

display all the even numbers :
from array import *

rno = array('i',[10,19,24,21])

for n in rno:
if n%2==0:
print(n)

display the sum of all even number ?

from array import *

rno = array('i',[10,19,24,21,12,78,24,90,2,5,9])

sum = 0;

for n in rno:
if n%2==0:
sum = sum + n;

print(sum)

=== remove the data from array...

from array import *

rno = array('i',[10,19,24,21,12,78,24,90,2,5,9])

for n in rno:
print(n)


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