whitespace
separator for character strings (e.g. between words or expressions)
horizontal tab character
C0 control character, used for tabulations; commonly entered by the tab key; considered whitespace
thin space
space character about ⅕ of an em wide
line feed
control character indicating the end of a line in a text file, considered as one of the 'blank characters' in a character set
non-breaking space
space character that prevents an automatic line break at its position
carriage return
control character, or mechanism, used to reset a device's position to the beginning of a line of text
page break
control character indicating the end of a page, considered as one of the 'blank characters' in a character set
zero-width space
Unicode character
space
blank area that separates words, sentences, syllables, or other written or printed glyphs; precise typographical rules differ according to language and context
indentation
empty space at the beginning of a line to signal the start of a new paragraph