The site linked below is oriented to young students, and can show block letters individually. Basically, block letters are upright (as opposed to Italic) letters that have no embellishments or adornments. The font used here in the answer windows contains mostly block letters. What do I mean by embellishments or adornments? Look to the right, at the header "Recent recommendations". Notice the upper case R. Compare it to this R and the R you see at the link. At the bottom of the straight vertical line is a horizontal footer, and at the top, there is a small jot out to the left. These marks are called serifs, and they are historically connected to the appearance of the stone engraved lettering of ancient Rome. Engravers may have gotten into the habit of cutting letters into stone, exactly following the texts painted onto the stone for them. Block letters show just the essential features of the letter without any extra flair.
in arithmetic,variables look like
They look like pictures
like it always does
brown and black
johnny Taylor
They resemble letters of the alphabet.
letters of the alphabet a-z
block
Grey block with Red viens
letters of the alphabet and one looks like a ! and the second looks like a ?
full of stores.
Capitalized letters are the "bigger" versions of letters. These are the ones that appear on your computer keyboard.