2 strokes · 2 jōyō kanji
The radical is highlighted in color in each kanji.
入 is the “enter” radical — Kangxi radical #11, 2 strokes. It appears in 2 of the 2,136 jōyō kanji, listed below from the simplest to the most complex with the radical highlighted in color in each one.
A note on 全 (“whole”): it is classified under this radical by tradition, but in its modern printed form the top is written as 人 (person). So the highlighted radical in 全 looks like 人 rather than 入 — there is no separate 入 stroke in the glyph to mark.