in-, not, non, -teg, contact, 語源は tangible, intact と同じ。
英語の語源
integer (n.)
"a whole number" (opposed to fraction), 1570s, from Latin integer (adj.) "whole, complete," figuratively, "untainted, upright," literally "untouched," from in- "not" (see in- (1)) + root of tangere "to touch" (see tangent (adj.)). The word was used earlier in English as an adjective meaning "whole, entire" (c. 1500).
例文
1. Surely the output should be true and then false,since both Integer objects are the same.