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Fixed the code in Matrix Multiplication in the file docs/datastructure.rst #128

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Fixed the code in Matrix Multiplication in the file docs/datastructure.rst #128

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8 changes: 4 additions & 4 deletions docs/datastructure.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -439,7 +439,7 @@ In this example we will multiply two matrices. First we will take input the numb
b.append([int(x) for x in input("").split(" ")])
c = []
for i in range(0, n):
c.append([a[i][j] * b[j][i] for j in range(0, n)])
c.append([ sum([a[i][k] * b[k][j] for k in range(0, n)]) for j in range(0,n) ])
print("After matrix multiplication")
print("-" * 10 * n)
for x in c:
Expand All @@ -464,9 +464,9 @@ The output
3 2 1
After matrix multiplication
------------------------------
9 12 9
32 25 12
49 32 9
30 24 18
84 69 54
138 114 90
------------------------------

Here we have used list comprehensions couple of times. *[int(x) for x in input("").split(" ")]* here first it takes the input as string by *input()*, then split the result by " ", then for each value create one int. We are also using *[a[i][j] * b[j][i] for j in range(0,n)]* to get the resultant row in a single line.
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