In the order of capital e, write vertical fold first, then horizontal fold, and finally middle and horizontal fold.

E is the fifth letter of the Latin alphabet and the English alphabet. It comes from a Greek letter Epsilon(ε, ε, ε) with similar shape and function. ? Hê in Semitic language may be the first word to express function or address people.

In Semitic, the letter /h/ (in other languages, it can be /e/), and in Greek, hê becomes εεελνν(Epsilon)attack/e/. "Capital e" refers to the unknown in mathematics, the energy symbol in physics, the expected value in statistics, etc.

Extended data:

Purpose of the letter e:

1, a note, e or e, the third note in the scale of c major or the fifth note in the scale of c minor.

2. In the international system of units, e stands for EXA (1e =1018).

3. Mathematically, e is used to represent "scientific counting method", such as 3.2×10/8, which means E = exponent; Power.

4, often used as the euro symbol (capital e, written as a circle, two horizontal).

5. Statistical expectations.

6. Young's modulus of material mechanics.

7. The symbol of physical energy is E = MC 2.

8. The symbol of electromotive force in physics E=U+Ir.

9.e can be expressed as an unknown number in mathematics.