The d3.sum() function in D3.js is used to return the sum of the given array’s elements. If the array is empty then it returns 0.
Syntax:
d3.sum(Array)
Parameters: This function accepts a parameters Array which is an array of elements whose sum are to be calculated.
Return Value: It returns the sum of the given array’s element.
Below programs illustrate the d3.sum() function in D3.js.
Example 1:
<html> <head> <title> Getting sum of the elements of given array </title> </head> <body> </script> <script> // initialising the array of elements var Array1 = [10, 20, 30, 40, 50, 60]; var Array2 = [1, 2]; var Array3 = [0, 1.5, 6.8]; var Array4 = [.8, .08, .008]; // Calling to d3.sum() function A = d3.sum(Array1); B = d3.sum(Array2); C = d3.sum(Array3); D = d3.sum(Array4); // Getting sum of the given array's element document.write(A + "<br>"); document.write(B + "<br>"); document.write(C + "<br>"); document.write(D + "<br>"); </script> </body> </html> |
Output:
210 3 8.3 0.888
Example 2:
<html> <head> <title> Getting sum of the elements of given array </title> </head> <body> </script> <script> // initialising the array of elements var Array1 = []; var Array2 = ["a", "b", "c"]; var Array3 = [1, "B", "C"]; var Array4 = ["Geek", "Geeks", 2, 3, "neveropen"]; // Calling to d3.sum() function A = d3.sum(Array1); B = d3.sum(Array2); C = d3.sum(Array3); D = d3.sum(Array4); // Getting sum of the given array's element document.write(A + "<br>"); document.write(B + "<br>"); document.write(C + "<br>"); document.write(D + "<br>"); </script> </body> </html> |
Output:
0 0 1 5
Note: In the above output, if the parameter is empty or strings then it returns 0 and if the parameter is string including some integers value then the sum of the integer’s value is returned.
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