Python Program to find sum of array

Given an array of integers, find the sum of its elements.

Examples :

Input : arr[] = {1, 2, 3} Output : 6 1 + 2 + 3 = 6 Input : arr[] = {15, 12, 13, 10} Output : 50

**Method 1:**

`# Python 3 code to find sum ` `# of elements in given array ` `def` `_sum(arr): ` ` ` ` ` `# initialize a variable ` ` ` `# to store the sum ` ` ` `# while iterating through ` ` ` `# the array later ` ` ` `sum` `=` `0` ` ` ` ` `# iterate through the array ` ` ` `# and add each element to the sum variable ` ` ` `# one at a time ` ` ` `for` `i ` `in` `arr: ` ` ` `sum` `=` `sum` `+` `i ` ` ` ` ` `return` `(` `sum` `) ` ` ` `# driver function ` `arr` `=` `[] ` `# input values to list ` `arr ` `=` `[` `12` `, ` `3` `, ` `4` `, ` `15` `] ` ` ` `# calculating length of array ` `n ` `=` `len` `(arr) ` ` ` `ans ` `=` `_sum(arr) ` ` ` `# display sum ` `print` `(` `'Sum of the array is '` `, ans) ` ` ` `# This code is contributed by Himanshu Ranjan ` |

**Output:**

Sum of the array is 34

**Method 2:**

`# Python 3 code to find sum ` `# of elements in given array ` `# driver function ` `arr ` `=` `[] ` ` ` `# input values to list ` `arr ` `=` `[` `12` `, ` `3` `, ` `4` `, ` `15` `] ` ` ` `# sum() is an inbuilt function in python that adds ` `# all the elements in list,set and tuples and returns ` `# the value ` `ans ` `=` `sum` `(arr) ` ` ` `# display sum ` `print` `(` `'Sum of the array is '` `,ans) ` ` ` `# This code is contributed by Dhananjay Patil ` |

**Output:**

Sum of the array is 34

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