"✍️"
# @workUnit
def stars(height: int):
    if height < 0:
        raise Exception("Height is negative.", height)
    for i in range(height):
        print("*" * (i+1))
        
        
"🔒"
# @check
# @title: check 1
stars(10)
#Result
#*
#**
#***
#****
#*****
#******
#*******
#********
#*********
#**********
"🔒"
# @check
# @title: height=0
stars(0)
#Result

"🔒"
# @check
# @title: no parameter
try:
    stars(-5)
except Exception as e:
    print(type(e))
    print(e.args)
#Result
#<class 'Exception'>
#('Height is negative.', -5)