Sum of diagonal elements
Question:
Write a program to find the sum of diagonal elements
Program:
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a = [[11,2,4],[4,5,6],[10,8,-12]] n=len(a) sumn=0 for i in range(n): for j in range(n): if i+j==n-1: sum+=a[i][j] print (sumn) |
Explanation:
Diagonal elements are those where i=j, as in a[0][0], a[1][1] etc.the for loop cheks every instant if i is equal to j, if true value of a[i][j] is incremented to sum.
Output:
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1 |
19 |
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