how should I convert string to integer and sum the list?

Question

I want to sum up the list of string. I tried to convert strings to integers by using for loop and int(). But it didn't work. What should I do? Thank you for your answer!

a = ['1','2','3']
total = 0
for i in a:
    int(i)
    total = total + i

print(total) #expected output:6

Answer 1

Use sum() with map() to map each item to int:

a = ['1','2','3']

print(sum(map(int, a)))
# 6

---

int(i) as such does not alter i unless you assign it back. So your code should be:

for i in a:
    i = int(i)
    total = total + i

Or, shortly:

for i in a:
    total = total + int(i)