The logarithm to the base e, where e is an irrational constant approximately equal to 2.71828, commonly used in mathematics.

प्राकृतिक लघुगणक

English Usage: "To solve the equation, you need to calculate the natural logarithm of both sides."

Hindi Usage: "समीकरण को हल करने के लिए, आपको दोनों पक्षों का प्राकृतिक लघुगणक निकालना होगा।"