add new file l13.c

c/l13.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+int main() {
+    char pol[100];
+    printf("Enter word ");
+    scanf("%s", pol);
+    for(int i = 0; pol[i]; i++) {
+        pol[i] = tolower(pol[i]);
+    }
+    char x[100];
+    strcpy(x, pol);
+    int len = strlen(x);
+    for(int i = 0; i < len / 2; i++) {
+    char temp = x[i];
+    x[i] = x[len - 1 - i];
+    x[len - 1 - i] = temp;
+    }
+    if(strcmp(pol, x) == 0) {
+        printf("equal\n");
+    }
+    else {
+        printf("not equal\n");
+    }
+}