Iterative Statements

Range function

It returns a Collection containing sequence of number. These values can be used for looping.

To loop through a set of code a specified number of times, we can use the range() function
The range() function returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and ends at a specified number. We can generate a sequence of numbers using range() function.

range(start ,stop ,step) 
range(start ,stop)
range(stop)

Start:
- indicates start value of sequence
- Includes start value in sequence
- Default is zero
Stop:
- Indicates stop value of sequence
- Excludes stop value in sequence
Step:
- Indicates step for sequence
- Default is 1

#Write a program to print all nos from 1 to 10.

for i in range(1,11):
  print(i,end=' ')

1 2 3 4 5 6 7 8 9 10

#Write a program to print all nos from 10 to 1.

for i in range(10,0,-1):
  print(i,end=' ')

10 9 8 7 6 5 4 3 2 1

#Write a program to print all odd nos from 1 to 100.

for i in range(1,101,2):
  print(i,end=' ')

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99

#Write a program to print all even nos in range 1 to 100.

for i in range(2,101,2):
  print(i,end=' ')

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100

#Write a program to read a number and print all nos from 1 to given number.

n=int(input("Enter a Number"))
for i in range(1,n+1):
  print(i,end=' ')

Enter a Number 7 
1 2 3 4 5 6 7

#Write a program to read a number and print all nos from given number to 1.

n=int(input("Enter a Number"))
for i in range(n, 0, -1):
  print(i, end=' ')

Enter a Number 7 
7 6 5 4 3 2 1

#Write a program to read a number and find sum of all nos from 1 to given number.

n=int(input("Enter a Number"))
s=0
for i in range(1,n+1):
  s=s+i
print("Sum is ",s)

Enter a Number 5
Sum is 15

#Write a program to read a number and find factorial of given number.

n=int(input("Enter a Number"))
f=1
for i in range(1,n+1):
  f=f*i
print("Factorial is ",f)

Enter a Number 5
Factorial is 120

#Write a program to print all chars from string “Amravati”

city="Amravati"
for ch in city:
  print(ch)

A
m
r
a
v
a
t
i

#Write a program to count all ‘a’ in string “amravati”.

city="Amravati"
c=0
for ch in city:
  if ch=="a" or ch=="A":
    c=c+1
print("Total a are ",c)

Total a are 3