This page uses the Gaussian method to calculate the definite integral of a unary function. The accuracy is not as good as the <a href="c729">dragon method</a>, but it is faster and sometimes the accuracy is satisfactory. Enter the function expression in the edit box following f(x)= below. See the syntax of the function expression.

<a href="c712">Function Expression</a> page, also enter the lower and upper limits of the integration x1 and x2 (x1<x2) below. The range of the argument is generally the input number, but you can also enter the constant. Expression, input method of constant expression.

<a href="c703">Constant Expressions</a> page. Then click on the "Start Integration" button, the curve of the given function within the given range will be displayed and the integral value will be given.