all Python 3Strings (str)function

str.isdigit

character checks

True if all characters are digits (including superscripts like ²).

Syntax

s.isdigit()

The accepted set is wider than isdecimal's: superscripts and circled digits pass, yet int() raises ValueError on them. That makes isdigit a poor guard before converting to a number — when the real question is whether int(s) will work, use isdecimal or just try/except.

Examples

print('123'.isdigit())   # → True
print('²'.isdigit())     # → True
print('12.3'.isdigit())  # → False

See also

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