How to make python learn to subtitute one variable with another?

Question

I am working on a project and this is a sample doubt from my project

a = int(input("Enter Atomic Number: ")
e1 = "Hydrogen"
e2 = "Helium"
e3 = "Lithium"

Now, the program must print "Hydrogen" if a = 1 and it must print "Helium" if a = 2 Note that I must do it for whole 118 elements and cannot use if statements.

Create a dictionary that maps atomic numbers to names. – Klaus D. Jun 22 '20 at 13:37 — Klaus D., Jun 22 '20 at 13:37
you can try: `print(eval("e"+"1"))` – Harsha Biyani Jun 22 '20 at 13:40 — Harsha Biyani, Jun 22 '20 at 13:40

score 3 · Answer 1 · edited Jun 22 '20 at 13:38

3

You need to use some mapping type like dict. I Have made some changes to show you example hot it can be solved.

a = int(input("Enter Atomic Number: "))
elements = {
    1: "Hydrogen",
    2: "Helium",
    3: "Lithium"
}
element = elements.get(a, "Element not found")
print(element)

edited Jun 22 '20 at 13:38

deceze

510,633
85
743
889

answered Jun 22 '20 at 13:38

Take_Care_

1,957
1
22
24

score 1 · Answer 2 · answered Jun 22 '20 at 13:39

1

Use dictionary data structure

a = int(input("Enter Atomic Number: ")
elements={ 1: "Hydrogen" ,2: "Helium" }
print(elements[a])

answered Jun 22 '20 at 13:39

Jaya Shankar B

121
2
8

How to make python learn to subtitute one variable with another?

2 Answers2