diff --git a/demo.py b/demo.py
new file mode 100644
index 0000000..ba7ddae
--- /dev/null
+++ b/demo.py
@@ -0,0 +1,10 @@
+#给定两个数m，n，输出m和n之间的质数
+m=int(input())
+n=int(input())
+for i in range(m,n+1):
+    c=0
+    for j in range(1,i+1):
+        if i%j==0:
+            c+=1
+    if c==2:
+        print(i)
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