How can I count elements of a list within a certain range?

Question

i need to calculate how much numbers form string got value higher or equal to 25 and lower or equal to 50

numbers = [25, 24, 26, 45, 25, 23, 50, 51]

#  'count' should be 5 
count = 0

# I need to filter all numbers and only numbers what are higher than 25 can stay 

numbers = [25, 24, 26, 45, 25, 23, 50, 51]

#  'filtered' should be equal to [26, 45, 50, 51]
filtered = []

What have you tried so far? I don't see anything related to an if statement. — Axe319, Apr 20 '20 at 15:27
Does this answer your question? [Return list of items in list greater than some value](https://stackoverflow.com/questions/4587915/return-list-of-items-in-list-greater-than-some-value) — andreis11, Apr 20 '20 at 15:29
If your condition is `25 <= num <= 50`, then `filtered` must be `[25, 26, 45, 25, 50]`. Don't you agree? — Devansh Soni, Apr 20 '20 at 15:34

kederrac · Accepted Answer · 2020-04-20T15:41:13.083

10

I need to filter all numbers and only numbers what are higher than 25 can stay

you can use the built-in function filter:

numbers = [25, 24, 26, 45, 25, 23, 50, 51]
filtred = list(filter(lambda x : x > 25, numbers))
# [26, 45, 50, 51]

how much numbers form string got value higher or equal to 25 and lower or equal to 50

you can use the built-in function sum:

count = sum(1 for e in numbers if e >= 25 and e<= 50)
# 5

edited Apr 20 '20 at 15:41

answered Apr 20 '20 at 15:34

kederrac

16,819
6
32
55

This should work too `count = sum(1 for e in numbers if 25 < e < 51)` – Ramin Melikov Apr 18 '22 at 03:06

Ramin Melikov · Answer 2 · 2020-04-20T15:41:31.650

6

numbers = [25, 24, 26, 45, 25, 23, 50, 51]
count = len(numbers)
filtered = [num for num in numbers if 25 < num <= 50]
count -= len(filtered)

edited Apr 20 '20 at 15:41

answered Apr 20 '20 at 15:28

Ramin Melikov

967
8
14

lil_noob · Answer 3 · 2020-04-20T15:38:48.770

1

This should help

numbers = [25, 24, 26, 45, 25, 23, 50, 51]
count=0
f=[]
for i in numbers:
    if i>=25 and i<=50:
        f.append(i)
        count+=1
print(f)

edited Apr 20 '20 at 15:38

answered Apr 20 '20 at 15:31

lil_noob

87
1
12

score 0 · Answer 4 · answered Apr 20 '20 at 16:13

A simple way to do it would be to create an empty list, iterate through the current list and append all relevant items to the new list, like so:

numbers = [25, 24, 26, 45, 25, 23, 50, 51]
new_list =[]

for i in numbers:
    if i>=25 and i<=50:
        new_list.append(i)

print(new_list)

How can I count elements of a list within a certain range?

4 Answers4

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