1 files changed, 8 insertions, 0 deletions
diff --git a/usth/ICT3.2/prac/4/5.php b/usth/ICT3.2/prac/4/5.php
new file mode 100644
index 0000000..d148f5a
--- /dev/null
+++ b/usth/ICT3.2/prac/4/5.php
@@ -0,0 +1,8 @@
+<?php
+
+function is_prime(int $n): bool {
+    for ($i = 2; $i * $i <= $n; $i++)
+        if ($n % $i == 0)
+            return false;
+    return true;
+}