Complete collection of math functions in C language

C language math functions include abs function, fabs function, floor function, ceil function, sqrt function, pow function, exp function, log function, log10 function, sin function, cos function, tan function, asin function, acos function, atan function, atan2 function, fmod function, round function, etc.

The math function library in C language provides many mathematical functions that can be used to perform various mathematical calculations. Below is an overview of some common math functions and their capabilities.

abs function:

Function: Return the absolute value of an integer.

Example: The result of abs(-5) is 5.

fabs function:

Function: Return the absolute value of a floating point number.

Example: The result of fabs(-5.5) is 5.5.

floor function:

Function: Returns a rounded-down integer of a floating-point number, that is, the largest integer not greater than the floating-point number.

Example: The result of floor(3.7) is 3.0.

ceil function:

Function: Returns a rounded-up integer of a floating-point number, that is, the smallest integer that is not less than the floating-point number.

Example: The result of ceil(3.2) is 4.0.

sqrt function:

Function: Returns the square root of a floating point number.

Example: The result of sqrt(25) is 5.0.

pow function:

Function: Returns the specified power of a floating point number.

Example: The result of pow(2, 3) is 8.0.

exp function:

Function: Return the specified power of e.

Example: The result of exp(1) is 2.71828.

log function:

Function: Returns the natural logarithm of a floating point number.

Example: The result of log(10) is 2.30259.

log10 function:

Function: Returns the base 10 logarithm of a floating point number.

Example: The result of log10(100) is 2.0.

sin function:

Function: Returns the sine value of an angle.

Example: The result of sin(30) is 0.5.

cos function:

Function: Returns the cosine value of an angle.

Example: The result of cos(60) is 0.5.

tan function:

Function: Returns the tangent value of an angle.

Example: The result of tan(45) is 1.0.

asin function:

Function: Returns the arc sine of an angle.

Example: The result of asin(0.5) is 30.0.

acos function:

Function: Returns the inverse cosine of an angle.

Example: The result of acos(0.5) is 60.0.

atan function:

Function: Returns the arctangent value of an angle.

Example: The result of atan(1.0) is 45.0.

atan2 function:

Function: Returns the arctangent value of the two parameters.

Example: the result of atan2(1.0, 1.0) is 45.0.

fmod function:

Function: Returns the remainder of two floating point numbers.

Example: The result of fmod(10.5, 3.2) is 1.9.

round function:

Function: Returns a rounded integer of a floating point number.

Example: The result of round(3.7) is 4.0.

The above are only some of the functions in the math function library. There are many other functions available, such as: trunc, cbrt, hypot, remainder, etc. These functions provide a wide range of mathematical calculation functions to meet various mathematical calculation needs.

Before using these functions, you need to include the math.h header file in the program to access the declarations of these functions. In addition, it should be noted that when performing floating point calculations, there may be accuracy issues due to the characteristics of floating point numbers, so an appropriate error range should be used when comparing floating point numbers.

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