diff --git a/printNumbers/parameters.py b/printNumbers/parameters.py
index aebe0c3..c57cc73 100755
--- a/printNumbers/parameters.py
+++ b/printNumbers/parameters.py
@@ -25,7 +25,7 @@
 
 CONST_VERSION = 'V1.0'
 CONST_VERSION_STRING = '+ + PrintNumbers ' + CONST_VERSION + ' (Software Development in Science) + +'
-CONST_DEF_OPERAND_VAL = 10
+CONST_DEF_OPERAND_VAL = 5 # used to be 10
 CONST_MAX_OPERAND_VAL = 20
 CONST_FUNC_CODE_FIBONACCI = 0
 CONST_FUNC_CODE_FACTORIAL = 1