CODEWITHSUNDEEP
python-3.7
Mitesh Shah
Mitesh Shah

Reputation: 49

how to print the data accepted from user in the list in python?

enter image description here

I want to print the constructed list but it shows index out of range error. How do I do it?

students = []
marks = []
num = int(input("How many students?:  "))
for i in range(1,num):
     name = input("input name of student ")
     students.append(name)
     mark = input("input mark of the student")
     marks.append(mark)
     i+=1
for i in range(1,num):
     print(students[i] + ": "+marks[i])

Upvotes: 2

Views: 912

Answers (3)

shubham
shubham

Reputation: 513

you can do by only input statement also 

students = []
marks = []
num = int(input("How many students?:  "))
for i in range(num):
     name,mark = input("input name of student and marks of that student ").split(" ")
     students.append(name)
     marks.append(mark)
for i in range(num):
     print(students[i] + ": "+marks[i])

Upvotes: 0

AnkushRasgon
AnkushRasgon

Reputation: 820

I will break this problem step by step

students = []
marks = []
num = int(input("How many students?:  "))
for i in range(1,num):
     name = input("input name of student ")
     students.append(name)
     mark = input("input mark of the student")
     marks.append(mark)

Input section

How many students?:  2
input name of student stark
input mark of the student22

In this code :

students list =['stark']
Marks list=['22']

But in your another for loop

for i in range(1,num):
    print(students[i] + ": "+marks[i])

this will not work because python index starts with 0 and your for loop starting with 1 and you can print those values at students[0] only not students[1] as per according to your loop

for i in range(num-1):  #because num value is 2 and provided value is 1 it will give list out  of index at 2
      print(students[i] + ": "+marks[i])

Upvotes: 1

Siong Thye Goh
Siong Thye Goh

Reputation: 3586

  • Python indexing begins with 0, and when you use for i in range(n), it will automatically increment and you do not need to increment at the end of the loop.

  • When you use range(1,num), the index runs from 1 to num - 1 only. Hence initially even though you key in 3, you get only 2 prompts.

    students = []
    marks = []
    num = int(input("How many students?:  "))
    for i in range(num):
         name = input("input name of student ")
         students.append(name)
         mark = input("input mark of the student")
         marks.append(mark)
    for i in range(num):
         print(students[i] + ": "+marks[i])

Upvotes: 0

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