The expression "ln(e)" refers to the natural logarithm of the mathematical constant e, which is approximately equal to 2.71828. The natural logarithm is the logarithm to the base e, and it is commonly used in mathematics, particularly in calculus and exponential growth problems. When calculating "ln(e)", the result is 1. This is because the natural logarithm answers the question: "To what power must e be raised to obtain e?" Since e raised to the power of 1 equals e, the value of "ln(e)" is simply 1.