7 has always been my favorite number. It's very lucky for me.
7 (seven; ) is the natural number between 6 and 8
Yes, I know. It is also an interesting number (7 deadly sins, etc) and can be known to be a lucky number
various Hindus wrote 7 more or less in one stroke as a curve that looks like an uppercase J but vertically inverted.
That is interesting!
More so ,The western Ghubar Arabs' main contribution was to make the longer line diagonal rather than straight, though they showed some tendencies to making the character 
That is some great information. Is there anything else you know?
 As is the case with the European glyph, the Cham and Khmer glyph for 7 also evolved to look like their glyph for 1, though in a different way
You have educated me very well on the number 7. Thank you.
You are welcome!Modern Arab forms influenced the European form, a two-stroke character consisting of a horizontal upper line joined at its right to a line going down to the bottom corner, 7 also depicts some religious importance