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M_E, M_LOGxxx, M_LNxx #defines

Header File 

math.h 

Description 

The constant values for logarithm functions.

Name  
Meaning  
M_E  
The value of e  
M_LOG2E  
The value of log(e)  
M_LOG10E  
The value of log10(e)  
M_LN2  
The value of ln(2)  
M_LN10  
The value of ln(10)  
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