checking parameters in bash scripts

a1/client.sh

@@ -19,6 +19,12 @@
 #java client $1 $2 $3 "$4"
 
 #For Python implementation
+if [ "$#" -ne 4 ];
+then
+  echo "Program takes 4 parameters, which are a server address, server port, req_code, and string (in quotes) to be reversed"
+  exit 1
+fi
+
 python3 client.py $1 $2 $3 "$4"
 
 #For Ruby implementation

a1/server.sh

@@ -18,6 +18,12 @@
 #java server $1
 
 #For Python implementation
+if [ "$#" -ne 1 ];
+then
+  echo "Program takes 1 parameter, which is a req_code"
+  exit 1
+fi
+
 python3 server.py $1
 
 #For Ruby implementation