loge()

Return the natural logarithm of the argument.

Syntax

loge(argument)

Parameter

Parameter

Definition

argument

numeric value whose natural logarithm is to be determined 

Valid Values 
argument > 0

Description

The loge() function returns the logarithm of argument with respect to the natural logarithm base e = 2.71828 . . . 

The output range for the loge() function is – ∞< loge() < ∞ .

Example

The following loge() function calls print a number of useful physical and mathematical constants:

function main() {
PI = 3.141593;
printf("loge(PI) = %7.4f\n",loge(PI));
printf("loge(10) = %7.4f\n",loge(10));
printf("loge( 2) = %7.4f\n",loge(2));
printf("loge( 3) = %7.4f\n",loge(3));
return;
}

The example produces the following output:

loge(PI) = 1.1447
loge(10) = 2.3026
loge( 2) = 0.6931
loge( 3) = 1.0986


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