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Sum() Function in Python Syntax sum(a) : a is the list , it adds up all the numbers in the list a and takes start to be 0, so returning only the sum of the numbers in the list.

In C programming, the expression `sum += value;` is a shorthand notation for adding a value to a variable and assigning the result back to the same variable. It is equivalent to writing `sum = sum + value;`.

Using the Mathematical Formula #include<stdio.h> int main() { int n = 40; // declare & initialize local variable n. int sum = (n * (n + 1) ) / 2; /* define the mathematical formula to calculate the sum of given number. */ printf("Sum of %d natural number is = %d", n, sum); // print the sum of natural number. return 0; }

Algorithm to Add Two Numbers in C Start. Declare variables num1, num2, and res. Read values for num1 and num2. Add the values of num1 and num2 and assigned the result to a res variable. Print res. Stop.

For (int i = 0; i < length; i++) { sum = sum + arr[i]; } printf("Sum of all the elements of an array: %d", sum);

Working and Algorithm Include the Required header files using include keyword. Initialize the required variables. Create a variable sum = 0. Call function getSum(0, a, b) In each recursion, call return i + getSum(sum, i + 1, b) In base Case i.e. when recursion call goes beyond upper limit return sum.

Python's built-in function sum() is an efficient and Pythonic way to sum a list of numeric values. Adding several numbers together is a common intermediate step in many computations, so sum() is a pretty handy tool for a Python programmer.