Input Validation -Swift
I am trying to write a program where I ask the user to enter a number. If the user enters a number, the program would execute a print statement. This part I have covered but I'm having issues on how to ask the user for a new number if they did not enter one.
print("enter number")
if let input = readLine()
if let number = Int(input)
repeat
if number > 0
print("haha")
else
print("not a positive number")
print("enter another positive number")
while number < 0
swift loops
edited Nov 10 at 5:11
rmaddy
238k27309375
asked Nov 10 at 4:36
user2686721
32
add a comment |
I am trying to write a program where I ask the user to enter a number. If the user enters a number, the program would execute a print statement. This part I have covered but I'm having issues on how to ask the user for a new number if they did not enter one.
print("enter number")
if let input = readLine()
if let number = Int(input)
repeat
if number > 0
print("haha")
else
print("not a positive number")
print("enter another positive number")
while number < 0
swift loops
edited Nov 10 at 5:11
rmaddy
238k27309375
asked Nov 10 at 4:36
user2686721
32
Your current code also doesn't look like it works properly. What happens when i enter a negative number?
– Rakesha Shastri
Nov 10 at 4:53
It works when you enter a negative number, but that's the part where I have issues.. how do I send the flow back to where the code asks for the number again?
– user2686721
Nov 10 at 5:15
That was my point.
– Rakesha Shastri
Nov 10 at 5:16
lol.. that's mine too
– user2686721
Nov 10 at 5:24
add a comment |
I am trying to write a program where I ask the user to enter a number. If the user enters a number, the program would execute a print statement. This part I have covered but I'm having issues on how to ask the user for a new number if they did not enter one.
print("enter number")
if let input = readLine()
if let number = Int(input)
repeat
if number > 0
print("haha")
else
print("not a positive number")
print("enter another positive number")
while number < 0
swift loops
edited Nov 10 at 5:11
rmaddy
238k27309375
asked Nov 10 at 4:36
user2686721
32
I am trying to write a program where I ask the user to enter a number. If the user enters a number, the program would execute a print statement. This part I have covered but I'm having issues on how to ask the user for a new number if they did not enter one.
print("enter number")
if let input = readLine()
if let number = Int(input)
repeat
if number > 0
print("haha")
else
print("not a positive number")
print("enter another positive number")
while number < 0
swift loops
swift loops
edited Nov 10 at 5:11
rmaddy
238k27309375
asked Nov 10 at 4:36
user2686721
32
edited Nov 10 at 5:11
rmaddy
238k27309375
asked Nov 10 at 4:36
user2686721
32
edited Nov 10 at 5:11
rmaddy
238k27309375
edited Nov 10 at 5:11
rmaddy
238k27309375
edited Nov 10 at 5:11
rmaddy
238k27309375
238k27309375
asked Nov 10 at 4:36
user2686721
32
asked Nov 10 at 4:36
user2686721
32
asked Nov 10 at 4:36
user2686721
32
32
Your current code also doesn't look like it works properly. What happens when i enter a negative number?
– Rakesha Shastri
Nov 10 at 4:53
It works when you enter a negative number, but that's the part where I have issues.. how do I send the flow back to where the code asks for the number again?
– user2686721
Nov 10 at 5:15
That was my point.
– Rakesha Shastri
Nov 10 at 5:16
lol.. that's mine too
– user2686721
Nov 10 at 5:24
add a comment |
Your current code also doesn't look like it works properly. What happens when i enter a negative number?
– Rakesha Shastri
Nov 10 at 4:53
It works when you enter a negative number, but that's the part where I have issues.. how do I send the flow back to where the code asks for the number again?
– user2686721
Nov 10 at 5:15
That was my point.
– Rakesha Shastri
Nov 10 at 5:16
lol.. that's mine too
– user2686721
Nov 10 at 5:24
Your current code also doesn't look like it works properly. What happens when i enter a negative number?
– Rakesha Shastri
Nov 10 at 4:53
Your current code also doesn't look like it works properly. What happens when i enter a negative number?
– Rakesha Shastri
Nov 10 at 4:53
It works when you enter a negative number, but that's the part where I have issues.. how do I send the flow back to where the code asks for the number again?
– user2686721
Nov 10 at 5:15
It works when you enter a negative number, but that's the part where I have issues.. how do I send the flow back to where the code asks for the number again?
– user2686721
Nov 10 at 5:15
That was my point.
– Rakesha Shastri
Nov 10 at 5:16
That was my point.
– Rakesha Shastri
Nov 10 at 5:16
lol.. that's mine too
– user2686721
Nov 10 at 5:24
lol.. that's mine too
– user2686721
Nov 10 at 5:24
add a comment |
1 Answer
1
active
oldest
votes
The loop needs to be at the top level with everything else inside. Break the loop when appropriate.
var more = true
repeat
print("enter number")
if let input = readLine()
if let number = Int(input)
if number > 0
print("haha")
more = false
else
print("not a positive number")
else
print("not a number")
else
print("nothing entered")
// maybe exit here too?
while more
Here I exit once a valid number is entered. Adjust how you wish to finish based on your actual needs.
answered Nov 10 at 5:29
rmaddy
238k27309375
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The loop needs to be at the top level with everything else inside. Break the loop when appropriate.
var more = true
repeat
print("enter number")
if let input = readLine()
if let number = Int(input)
if number > 0
print("haha")
more = false
else
print("not a positive number")
else
print("not a number")
else
print("nothing entered")
// maybe exit here too?
while more
Here I exit once a valid number is entered. Adjust how you wish to finish based on your actual needs.
answered Nov 10 at 5:29
rmaddy
238k27309375
add a comment |
The loop needs to be at the top level with everything else inside. Break the loop when appropriate.
var more = true
repeat
print("enter number")
if let input = readLine()
if let number = Int(input)
if number > 0
print("haha")
more = false
else
print("not a positive number")
else
print("not a number")
else
print("nothing entered")
// maybe exit here too?
while more
Here I exit once a valid number is entered. Adjust how you wish to finish based on your actual needs.
answered Nov 10 at 5:29
rmaddy
238k27309375
add a comment |
The loop needs to be at the top level with everything else inside. Break the loop when appropriate.
var more = true
repeat
print("enter number")
if let input = readLine()
if let number = Int(input)
if number > 0
print("haha")
more = false
else
print("not a positive number")
else
print("not a number")
else
print("nothing entered")
// maybe exit here too?
while more
Here I exit once a valid number is entered. Adjust how you wish to finish based on your actual needs.
answered Nov 10 at 5:29
rmaddy
238k27309375
The loop needs to be at the top level with everything else inside. Break the loop when appropriate.
var more = true
repeat
print("enter number")
if let input = readLine()
if let number = Int(input)
if number > 0
print("haha")
more = false
else
print("not a positive number")
else
print("not a number")
else
print("nothing entered")
// maybe exit here too?
while more
Here I exit once a valid number is entered. Adjust how you wish to finish based on your actual needs.
answered Nov 10 at 5:29
rmaddy
238k27309375
answered Nov 10 at 5:29
rmaddy
238k27309375
answered Nov 10 at 5:29
rmaddy
238k27309375
answered Nov 10 at 5:29
rmaddy
238k27309375
238k27309375
add a comment |
add a comment |
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Your current code also doesn't look like it works properly. What happens when i enter a negative number?
– Rakesha Shastri
Nov 10 at 4:53
It works when you enter a negative number, but that's the part where I have issues.. how do I send the flow back to where the code asks for the number again?
– user2686721
Nov 10 at 5:15
That was my point.
– Rakesha Shastri
Nov 10 at 5:16
lol.. that's mine too
– user2686721
Nov 10 at 5:24