log10()
Return the logarithm to base 10 of the argument.
Syntax
log10(argument)
Parameter
Parameter | Definition |
|---|---|
argument | numeric value whose base 10 logarithm is to be determined *Valid Values* |
Description
The log10() function returns the logarithm of argument with respect to base 10. The output range for the log10() function is – ∞ < log10() < ∞ .
Example
The following log10() function calls print a number of useful physical and mathematical constants:
function main() {
PI = 3.141593;
printf("log10(PI) = %7.4f\n",log10(PI));
printf("log10( e) = %7.4f\n",log10(exp(1)));
printf("log10( 2) = %7.4f\n",log10(2));
printf("log10( 3) = %7.4f\n",log10(3));
return;}
PI = 3.141593;
printf("log10(PI) = %7.4f\n",log10(PI));
printf("log10( e) = %7.4f\n",log10(exp(1)));
printf("log10( 2) = %7.4f\n",log10(2));
printf("log10( 3) = %7.4f\n",log10(3));
return;}
The example produces the following output:
log10(PI) = 0.4971
log10( e) = 0.4343
log10( 2) = 0.3010
log10( 3) = 0.4771
log10( e) = 0.4343
log10( 2) = 0.3010
log10( 3) = 0.4771
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