Number in C++
Generally, while working with the numbers in C++, the use of primitive data types like long, short, float, int, etc. are used. These are basically the general math functions that are provided by the C++ programming and is the header file that is required to use these functions.
Here are the list of functions sorted according to their genre along with a brief description:
Nearest integer operations in C++
| Method |
Description |
| ceil(x) |
This function rounds up the value of x. |
| floor(x) |
This function generally rounds down the value of x. |
| round(x) |
This function generally rounds off the value of x. |
| lround(x) |
This function is used to round off the value of x and cast to long integer. |
| llround(x) |
This function is used to round off the value of x and cast that value to the long integer. |
| fmod(n,d) |
This function is used to calculate the remainder of division n/d. |
| trunc(x) |
This function is used to round off the value x towards zero. |
| rint(x) |
This function is used to round off the value of x using rounding mode. |
| lrint(x) |
This function is used to round off the value of x using rounding mode and cast to long integer. |
| llrint(x) |
This function is used to round off the value x and cast to long long integer. |
| nearbyint(x) |
This function is used to round off the value x to a nearby integral value. |
| remainder(n,d) |
This function is used to calculate the remainder of n/d. |
| remquo() |
This function is used to calculate the remainder and quotient both. |
Power functions in C++
| Method |
Description |
| pow(x,y) |
This function generally computes x raised to the power y. |
| sqrt(x) |
This function generally calculates the square root of x. |
| cbrt(x) |
This function generally calculates the cube root of x. |
| hypot(x,y) |
This function is used to find the hypotenuse of a right angled triangle. |
Trignometric Functions in C++
| Method |
Description |
| cos(x) |
This function in C++ is used to compute the cosine of x. |
| sin(x) |
This function in C++ is used to compute the sine of x. |
| tan(x) |
This function in C++ is used to compute the tangent of x. |
| acos(x) |
This function in C++ is used to find the inverse cosine of x. |
| asin(x) |
This function in C++ is used to find the inverse sine of x. |
| atan(x) |
This function in C++ is used to find the inverse tangent of x. |
| atan2(x,y |
This function in C++ is used to find the inverse tangent of a coordinate x and y. |
Hyperbolic Functions in C++
| Method |
Description |
| cosh(x) |
This function in C++ is used to compute the hyperbolic cosine of x. |
| sinh(x) |
This function in C++ is used to compute the hyperbolic sine of x. |
| tanh(x) |
This function in C++ is used to compute the hyperbolic tangent of x. |
| acosh(x) |
This function in C++ is used to find the arc hyperbolic cosine of x. |
| asinh(x) |
This function in C++ is used to find the arc hyperbolic sine of x. |
| atanh(x) |
This function in C++ is used to find the arc hyperbolic tangent of x. |
Exponential Functions in C++
| Method |
Description |
| exp(x) |
This function in C++ is used to compute the exponential e raised to the power x. |
| frexp(value_type x,int* exp) |
This function in C++ is used to break a number into significand and 2 raised to the power exponent. |
| Idexp(float x, int e) |
This function in C++ is used to compute the product of x and 2 raised to the power e. |
| log(x) |
This function in C++ is used to compute the natural logarithm of x. |
| log10(x) |
This function in C++ is used to compute the common logarithm of x. |
| modf() |
This function in C++ is used to break a number into an integer and fractional part. |
| exp2(x) |
This function in C++ is used to compute the base 2 exponential of x. |
| expm1(x) |
This function in C++ is used to compute the exponential raised to the power x minus one. |
| log1p(x) |
This function in C++ is used to compute the natural logarithm of x plus one. |
| log2(x) |
This function in C++ is used to compute the base 2 logarithm of x. |
| logb(x) |
This function in C++ is used to compute the logarithm of x. |
| scalbn( x, n) |
This function in C++ is used to compute the product of x and FLT_RADX raised to the power n. |
| scalbln( x, n) |
This function in C++ is used to compute the product of x and FLT_RADX raised to the power n. |
| ilogb(x) |
This function in C++ is used to return the exponent part of x. |
Floating point manipulation functions in C++
| Method |
Description |
| copysign(x,y) |
This function in C++ is used to return the magnitude of x with the sign of y. |
| nextafter(x,y) |
This function is generally used to represent the next representable value of x in the direction of y. |
| nexttoward(x,y) |
This function is generally used to represent the next representable value of x in the direction of y. |
Maximum,Minimum and Difference functions in C++
| Method |
Description |
| fdim(x,y) |
This function is used to calculate the positive difference between x and y. |
| fmax(x,y) |
This function returns the larger number among two numbers x and y. |
| fmin() |
This function returns the smaller number among two numbers x and y . |
