$7\mathrm{.}5$ LAB: Checker for integer string

Forms often allow a user to enter an integer. Write a program that takes in a string representing an integer as input, and outputs Yes if

every character is a digit $0-9$ or No otherwise.

Ex: If the input is:

$1995$

the output is:

Yes

Ex: If the input is:

$42,000$

or any string with a non$-$integer character, the output is:

No

$537318\mathrm{.}4069638.q3zqy7$

LAB

ACTIVITY

$7\mathrm{.}5\mathrm{.}1$: LAB: Checker for integer string

$\frac{0}{10}$

main.py

Load default template...

$1$ user$\_$string $=$ input$()$

$\text{'}\text{'}\text{'}$ Type your code here.