Display a numeric input widget.

Function signature[source]

st.number_input(label, min_value=None, max_value=None, value=, step=None, format=None, key=None, help=None, on_change=None, args=None, kwargs=None, *, disabled=False, label_visibility="visible")


label (str)

A short label explaining to the user what this input is for. The label can optionally contain Markdown and supports the following elements: Bold, Italics, Strikethroughs, Inline Code, Emojis, and Links.

This also supports:

  • Emoji shortcodes, such as :+1: and :sunglasses:. For a list of all supported codes, see https://share.streamlit.io/streamlit/emoji-shortcodes.
  • LaTeX expressions, by wrapping them in "$" or "$$" (the "$$" must be on their own lines). Supported LaTeX functions are listed at https://katex.org/docs/supported.html.
  • Colored text, using the syntax :color[text to be colored], where color needs to be replaced with any of the following supported colors: blue, green, orange, red, violet.

Unsupported elements are unwrapped so only their children (text contents) render. Display unsupported elements as literal characters by backslash-escaping them. E.g. 1\. Not an ordered list.

For accessibility reasons, you should never set an empty label (label="") but hide it with label_visibility if needed. In the future, we may disallow empty labels by raising an exception.

min_value (int or float or None)

The minimum permitted value. If None, there will be no minimum.

max_value (int or float or None)

The maximum permitted value. If None, there will be no maximum.

value (int or float or None)

The value of this widget when it first renders. Defaults to min_value, or 0.0 if min_value is None

step (int or float or None)

The stepping interval. Defaults to 1 if the value is an int, 0.01 otherwise. If the value is not specified, the format parameter will be used.

format (str or None)

A printf-style format string controlling how the interface should display numbers. Output must be purely numeric. This does not impact the return value. Valid formatters: %d %e %f %g %i %u

key (str or int)

An optional string or integer to use as the unique key for the widget. If this is omitted, a key will be generated for the widget based on its content. Multiple widgets of the same type may not share the same key.

help (str)

An optional tooltip that gets displayed next to the input.

on_change (callable)

An optional callback invoked when this number_input's value changes.

args (tuple)

An optional tuple of args to pass to the callback.

kwargs (dict)

An optional dict of kwargs to pass to the callback.

disabled (bool)

An optional boolean, which disables the number input if set to True. The default is False. This argument can only be supplied by keyword.

label_visibility ("visible" or "hidden" or "collapsed")

The visibility of the label. If "hidden", the label doesn't show but there is still empty space for it above the widget (equivalent to label=""). If "collapsed", both the label and the space are removed. Default is "visible". This argument can only be supplied by keyword.


(int or float)

The current value of the numeric input widget. The return type will match the data type of the value parameter.


import streamlit as st

number = st.number_input('Insert a number')
st.write('The current number is ', number)

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