Calculate the odd sum of 1~n (1~100 as an example)

n=int(input())
sum=0
for i in range(1,n+1,2):
    sum+=i
print(sum)

Input 100 have to 2500

utilize range function ：range(1,5,2) # For from 1 To 5, interval 2( It doesn't contain 5)

Method 2： use while,matlab Thought

b=int(input())
n=1
sum=0
while n<b:
    sum+=n
    n+=2
print(sum)

Method 3

n=int(input())
sum=0
ls=[]
for i in range(1,n+1):
    if i %2!=0:
        sum+=i
print(sum)

Method 5： If you want to check the inside

n=int(input())
sum=0
ls=[]
for i in range(1,n+1):
    if  i %2!=0:
        sum+=i
        ls.append(i)# Show list , Beginners can't debug Internal numbers can be displayed in a list 
print(ls)# Show the numbers 
print(sum)

Is the number correct , It can be displayed in a list