What is I in Morse code?

I is two dots (··). It is a quick double tap, about as long as one dash, and many longer letters open with it, including S, U, H and F.

How is I different from E in Morse code?

E is one dot and I is two. Because both are so short, the pause that follows does the work: if the sender keeps proper spacing, a gap after one dot means E and a gap after two means I.

What does the question mark look like in Morse code?

The question mark is ··−−··, which you can hear as I, M and I run together. Once you know I and M well, this mark becomes much easier to catch inside a message.

The Letter I in Morse Code

I is ··: 2 short dis and no long dah, di-dit. It lasts 3 units.

··di-dit

I drawn to time: 3 units, then a 3-unit gap before the next letter.

SpeedSlow · 8 WPMNormal · 18 WPMFast · 25 WPM

Facts about I

Code: ·· · di-dit
Elements: 2 — 2 dots, no dash
Length: 3 units + 3 before the next letter
Time: 0.18 s at 20 WPM · 0.45 s at 8 WPM
Tree: E → I · below it: S, U
Frequency: 7.57% of English letters, 5th of 26²
Koch order: 13th sign of the course
Spelling: India
Same signal: И in Russian Morse · Ι in Greek Morse · ゛ in Wabun

§ 1Don’t confuse I with

Ithis letterdi-dit
Eone element shorterdit
Alast element differsdi-dah
Nfirst element differsdah-dit
Sone element longerdi-di-dit
Uone element longerdi-di-dah
Rone element longerdi-dah-dit
Done element longerdah-di-dit
Mmirror: every di and dah swappeddah-dah

Blue marks the elements that differ from I.

§ 2How to remember I

i-vy (··) — I mirrors M (−−): the same two beats, light and quick instead of long and slow.

§ 3Words with I

§ 4Questions about I

What is I in Morse code?: I is two dots (··). It is a quick double tap, about as long as one dash, and many longer letters open with it, including S, U, H and F.
How is I different from E in Morse code?: E is one dot and I is two. Because both are so short, the pause that follows does the work: if the sender keeps proper spacing, a gap after one dot means E and a gap after two means I.
What does the question mark look like in Morse code?: The question mark is ··−−··, which you can hear as I, M and I run together. Once you know I and M well, this mark becomes much easier to catch inside a message.