Binary search divide &conqur


Algorithm:

Algorithm BinSrch(a, i, I, a:) if (l=i) then

{

{

if (x =a[i]) then return i; else return 0;

else

}

{

mid := [(i+l)/2J;

if (x = a[mid]) then return mid; else if (x < a[midJ) then

return BinSrch(a, i, mid — 1, x); else return BinSrch(a, mid + 1,l,x);

}

}

 

Source Code:

def bin_search(a, i, l, x): if l == i:

if x == a[i]:

return i else:

return "Not Found"

else:

mid = (i+l) // 2 if x == a[mid]:

return mid elif x < a[mid]:

return bin_search(a, i, mid-1, x) else:

return bin_search(a, mid+1, l, x)

 

arr=[1,2,3,4,5,6,7,8,9]

num=int(input("Enter a number to search: ")) print("Index",bin_search(arr,0,8,num))




 

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