#stringLoop.py
#loop over indices of a string variable

s = input("Input a string: ")

print("Length of '" + s + "' is: " + str(len(s)))
#print("Length of ",s," is:",len(s))

     
for i in range(len(s)):    #indexes from 0 thru len(s)-1
    print(i, ":", s[i], end=" ")
    if s[i].isalpha():
        print("letter")
    elif s[i].isdigit():
        print("digit")
    else:
        print()
    
print("s[6]:",s[6])   #doesn't have to be in a loop

print("Another way to access each character of a string.")
for ch in s:
    print(ch)
   
#search
print("Search for a character in the string")
c = input("Enter the character to search for: ")

if c in s:
    print("found it with 'in'")
else:
    print("didn't find it with 'in'")
    
for i in range(len(s)):
    if c == s[i]:
        print("found it at index:", i)    #finds all of them

print("Find:", s.find(c))    #index where first found. returns -1 if not found

if s.find(c) != -1:
    print("found it with find")
else:
    print("didn't find it with find")

#reverse the string
for i in range(len(s)-1,-1,-1):
    print(s[i], end="")
print()

   
#slice  substring
start = eval(input("Slice start index: "))
stop = eval(input("Slice stop index: "))
print(s[start:stop])    #not an error if beyond end of string?

#upper it
print(s.upper())
print("s unchanged:",s)
s_upped = s.upper()
print(s_upped)
s = s.upper()
print("s is now uppered:",s)

#strings are immutable, i.e. can't be modified. 
#s[2] = 'X'    #will be error, so try it.

print(min(s))
print(max(s))
#print(sum(s))   #can't 'sum' a string