write a php program which reads an integer n and find the number of combinations. of a,b,c and d (0 ≤ a,b,c,d ≤ 9) where (a + b + c + d) will be equal to n in PHP


🤖 Code Explanation

This code is finding all of the possible 4 digit combinations where the sum of the digits is equal to a given number.

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