added: 1-isdigit.c

Author: hackerSa3edy

0x04-more_functions_nested_loops/1-isdigit.c

@@ -0,0 +1,20 @@
+#include "main.h"
+
+/**
+ * _isdigit - checks for a digit (0 through 9).
+ *
+ * @c: char to be checked
+ *
+ * Return: 1 if @c is digit, 0 otherwise
+ */
+int _isdigit(int c)
+{
+	if (c >= 48 && c <= 57)
+	{
+		return (1);
+	}
+	else
+	{
+		return (0);
+	}
+}

0x04-more_functions_nested_loops/main.h

@@ -1 +1,2 @@
 int _isupper(int);
+int _isdigit(int);