Codemind Python control statements

 

Excel Sheet Column

a=int(input())

p="ABCDEFGHIJKLMNOPQRSTUVWXYZ"

s=""

while a>0:

    r=a%26

    if r==0:

        s+='Z'

        a=(a//26)-1

    else:

        s+=p[r-1]

        a//=26

for i in range(len(s)-1,-1,-1):

    print(s[i],end="")

PRIMES IN RANGE

def prime(n):

    for i in range(2,int(n**0.5)+1):

        if(n%i==0):

            return 0

    else:

        if(n!=0 and n!=1):

            return 1

m=int(input())

n=int(input())

c=0

for i in range(m,n+1):

    if(prime(i)):

        c+=1

print(c)

FIND SUM OF NATURAL NUMBERS

a=int(input())

print((a*(a+1))//2)

COUNTING PRETTY NUMBERS

t=int(input())

for i in range(t):

    a,b=map(int,input().split())

    count=0

    for i in range(a,b+1):

        if i%10 in [2,3,9]:

            count+=1

    print(count)

FIND SUM OF SERIES

a=int(input())

sum=0.0

for i in range(1,a+1):

    sum+=(1/i)

print(format(sum,'.2f'))