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Write a C program for factorial of given number using recursion.

Give me answer with explanation.

8th Mar 2019, 5:25 PM
Manikanta KVV
Manikanta KVV - avatar
1 Respuesta
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int fac (int n) { if (n < 0) return -1; //n must be positive if (n <= 1) return 1; return n * fac (n-1); } n <= 1 will be the condition to exit our recursion. Let's say n is 3. We get 3 * fac (2), but 2 is also bigger than one, so we get 3 * 2 * fac (1). fac (1) returns 1, so the end result is 3*2*1
8th Mar 2019, 7:12 PM
Nikolay Rusev
Nikolay Rusev - avatar