Increasing numbers

In this exercise, we say that a natural number is increasing if every digit is less than or equal to the digit which is on its right (if any).

Write a recursive function that tells if a natural number @n@ is increasing or not.

Interface

C++	`bool is_increasing(int n);`
C	`int is_increasing(int n);`
Java	`public static boolean isIncreasing(int n);`
Python	`is_increasing(n) # returns bool`
	`is_increasing(n: int) -> bool`

You only need to submit the required procedure; your main program will be ignored.

Author: Unknown
Translator: Carlos Molina

Generation: 2026-01-25T10:25:53.122Z