A lakh (/læk, lɑːk/; abbreviated L; sometimes written lac[1]) is a unit in the Indian numbering system equal to one hundred thousand (100,000; scientific notation: 105).
It is widely used both in official and other contexts in Afghanistan, Bangladesh, Bhutan, India, Myanmar, Nepal, Pakistan, and Sri Lanka.
In Indian English, the word is used both as an attributive and non-attributive noun with either an unmarked or marked ("-s") plural, respectively.
In the abbreviated form, usage such as "₹5L" or "₹5 lac" (for "5 lakh rupees") is common.
[6][7] The modern word lakh derives from Sanskrit: लक्ष, romanized: lakṣa, originally denoting "mark, target, stake in gambling", but also used as the numeral for "100,000" in Gupta-era Classical Sanskrit (Yājñavalkya Smṛti, Harivaṃśa).