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C++ Math


C++ Math

C++ has many functions that allows you to perform mathematical tasks on numbers.


Max and min

The max(x,y) function can be used to find the highest value of x and y:

Example

cout << max(5, 10);
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And the min(x,y) function can be used to find the lowest value of x and y:

Example

cout << min(5, 10);
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C++ <cmath> Header

Other functions, such as sqrt (square root), round (rounds a number) and log (natural logarithm), can be found in the <cmath> header file:

Example

// Include the cmath library
#include <cmath>

cout << sqrt(64);
cout << round(2.6);
cout << log(2);
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Other Math Functions

A list of other popular Math functions (from the <cmath> library) can be found in the table below:

Function Description
abs(x) Returns the absolute value of x
acos(x) Returns the arccosine of x
asin(x) Returns the arcsine of x
atan(x) Returns the arctangent of x
cbrt(x) Returns the cube root of x
ceil(x) Returns the value of x rounded up to its nearest integer
cos(x) Returns the cosine of x
cosh(x) Returns the hyperbolic cosine of x
exp(x) Returns the value of Ex
expm1(x) Returns ex -1
fabs(x) Returns the absolute value of a floating x
fdim(x, y) Returns the positive difference between x and y
floor(x) Returns the value of x rounded down to its nearest integer
hypot(x, y) Returns sqrt(x2 +y2) without intermediate overflow or underflow
fma(x, y, z) Returns x*y+z without losing precision
fmax(x, y) Returns the highest value of a floating x and y
fmin(x, y) Returns the lowest value of a floating x and y
fmod(x, y) Returns the floating point remainder of x/y
pow(x, y) Returns the value of x to the power of y
sin(x) Returns the sine of x (x is in radians)
sinh(x) Returns the hyperbolic sine of a double value
tan(x) Returns the tangent of an angle
tanh(x) Returns the hyperbolic tangent of a double value

C++ Exercises

Test Yourself With Exercises

Exercise:

Use the correct function to print the highest value of x and y.

int x = 5;
int y = 10;
cout << (x, y);

Start the Exercise