----------------------------
int grades[] = getGradeList()
boolean found = false
int seeking = prompt "What value to find?"
for (int i = 0; i < grades.size; i++){
   if (grades[i] == seeking) then
		found = true
	  endif
endfor
if (found) then
	print "found a " + seeking
endif


----------------------------
// WRONG:
int grades[] = getGradeList()
boolean found = false
int seeking = prompt "What value to find?"
for (int i = 0; i < grades.size; i++){
   if (grades[i] == seeking) then
		found = true
	  else			  // NO
		found = false // NO
	  endif
endfor
if (found) then
	print "found a " + seeking
endif

----------------------------
int grades[] = getGradeList()
int seeking = prompt "What value to find?"
for (int i = 0; i < grades.size; i++)
   if (grades[i] == seeking) then
		print "found a " + seeking + " at " + i
	  endif
endfor

----------------------------
int grades[] = getGradeList()
int seeking = prompt "What value to find?"
int foundAt
boolean found = false
for (int i = 0; i < grades.size; i++)
   if (grades[i] == seeking) then
		foundAt = i
		found = true
	  endif
endfor
if (found) then
	print "found " + grades[foundAt] +" at "+ foundAt
endif

----------------------------
int grades[] = getGradeList()
int seeking = prompt "What value to find?"
int foundAt = -1 // negative means not found
for (int i = 0; i < grades.size; i++)
   if (grades[i] == seeking) then
		foundAt = i
	  endif
endfor
if (foundAt != -1) then
	print "found " + grades[foundAt] +" at "+ foundAt
endif

----------------------------
int grades[] = getGradeList()
int seeking = prompt "What value to find?"
int foundAt = -1
// end loop early if we found it
for (int i = 0; i < grades.size && foundAt == -1; i++)
   if (grades[i] == seeking) then
		foundAt = i
	  endif
endfor
if (foundAt != -1) then
	print "found " + grades[foundAt] +" at "+ foundAt
endif

----------------------------

int userIDs[] = getUserIDList
boolean valid = false
do
	int user = prompt "What is your ID?"
	for (int i = 0; i < userIDs.size; i = i + 1)
		if (user == userIDs[i]) {
			valid = true
		endif
	endfor
while (!valid)
print "Welcome to the system, user #" + user

// often we will want the location afterward,
// so could use index instead
int userIDs[] = getUserIDList
int foundAt = -1
do
	int user = prompt "What is your ID?"
	for (int i = 0; i < userIDs.size; i = i + 1)
		if (user == userIDs[i]) {
			foundAt = i
		endif
	endfor
while (foundAt == -1)
print "Welcome to the system, user #" + user