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Program to diagonalise a given matrix using Gauss Jordan method

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#Program to diagonalise a given matrix using Gauss Jordan method
a=[]
n=input("Enter the dimension of the matrix:")
n=int(n)
for i in range(n):
 r=input("Enter the elements for row "+str(i+1)+" :").split(",")
 r=list(map(float,r))
 a.append(r)
print("The entered matrix is:")
for i in range(n):
 print(a[i])
for c in range(0,n):
 for r in range(0,n):
  if r!=c:
   l=a[r][c]/a[c][c]
   for k in range(n):
    a[r][k]=a[r][k]-l*a[c][k]
print("The diagonalised matrix is:")
for i in range(n):
 print(a[i])
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