No, log base 10 and ln (natural logarithm) are not the same.
Log base 10, often written as log₁₀ or simply log, uses 10 as its base. It answers the question: ‘To what power must 10 be raised to get a certain number?’ For example, log₁₀(100) = 2 because 10² = 100.
On the other hand, ln, or the natural logarithm, uses the mathematical constant e (approximately 2.71828) as its base. It answers the question: ‘To what power must e be raised to get a certain number?’ For example, ln(e²) = 2 because e² = e².
In summary, while both log base 10 and ln are logarithms, they use different bases and thus give different results for the same input.