Link to doc page in question (if any):
https://docs.streamlit.io/en/stable/api.html?highlight=number_input#streamlit.number_input

Name of the Streamlit feature whose docs need improvement:
The documentation for the number_input states that you do not need to include a label when calling st.number_input(), but this throws an error because you do need to add something for the label

What you think the docs should say:
label (str) – A short label explaining to the user what this input is for.

Link to Streamlit forum where this is reported:
https://discuss.streamlit.io/t/number-input-error/8679