Unfortunately, we don't have a π symbol in emoji on iOS. So in order to send that symbol you'll either have to copy it from the text of this article and paste it in … or you can do what we did in the first place: add the Greek keyboard to your iPhone and type it from there!
The steps are simple. Head to Settings > General > Keyboards > Keyboards, tap Add New Keyboard… and choose Greek from the list.
Add a Greek keyboard to your iPhone to enable access to the letter Pi.
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Now that you've got the Greek keyboard available, simply switch to it by tapping the Globe icon down in the lower-left corner of your iOS keyboard and, when you cycle through to Greek, tap π!
Wish your friends a Happy π Day by choosing the letter from the Greek keyboard
Happy Pi Day! Or, well, Happy π Day!
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