problem 1:
j=1 for i in range(4): #print("i="+str(i)) #print("j="+str(j)) for j in range(j): print("*", end=' ') j+=4+i*2 print("\n")
problem2:
inputStr=print("Enter STOP if you want to stop!") inputStr=input("Please enter a string: ") list=[]; while inputStr.upper()!="STOP" : list.append(inputStr) inputStr=input("Please enter a string: ") size= len(list) for i in range(size): if(i== size-1): print(list[size-i-1]) else: print(list[size-i-1], end='\t') print("\n")
problem3:
list=[1,-10,3,5,-99,-57,35,221,4] list2=[] for i in list: if i>=0: list2.append(i) for j in list2: print(j, end=' ')