Python finding lowest integer

Question

I have the following code   l     -1 2    0 0    1    x   100 0 for i in l      if i  lt  x          x   i print x   The code should find the lowest value in my list  -1 2  but instead when i print  x  it finds the value is still 100 0 Where is my code going wrong

User · Answer

It looks like you want to convert the list to a list of numbers

>>> foo = ['-1.2', '0.0', '1']
>>> bar = map(float, foo)
>>> bar
[-1.2, 0.0, 1.0]
>>> min(bar)
-1.2

or if it really is strings you want, that you want to use min's key argument

>>> foo = ['-1.2', '0.0', '1']
>>> min(foo, key=float)
'-1.2'

User · Answer

Or no float conversion at all by just specifying floats in the list   l    -1 2  0 0  1  x   min l    or  l   min  -1 2  0 0  1

User · Answer

You have to start somewhere the correct code should be    The code to return the minimum value    l      0 0    1   -1 2   x   l 0  for i in l      if i  lt  x          x   i print x   But again it s good to use directly integers instead of using quotations      This way     l     0 0  1 -1 2  x   l 0  for i in l      if i  lt  x          x   i print x

User · Answer

Cast the variable to a float before doing the comparison   if float i   lt  float x     The problem is that you are comparing strings to floats  which will not work

User · Answer

Functions     import math   functions def min3 x1 x2 x3       if x1 lt   x2 and x1 lt   x3          return x1     elif x2 lt   x1 and x2 lt   x3          return x2     elif x3 lt   x2 and x3 lt   x1            return x3 print min3 4  7  5    print min3 4  5  5    print min3 4  4  4    print min3 -2  -6  -100    print min3  Z    B    A

User · Answer

Python has a built in min function to help you with finding the smallest   However  you need to convert your list items to numbers before you can find the lowest integer  what  isn t that float     min float i  for i in l

User · Answer

You have strings in the list and you are comparing them with the number 100 0

User · Answer

list1    10 -4 5 2 33 4 7 8 2 3 5 8 99 -34   print list1   max v list1 0   min v list1 0   for x in list1      if x gt max v          max v x         print  X is  0  and max is  1   format x max v   for x in list1      if x lt min v          min v x         print  X is  0  and min is  1   format x min v    print  Max values is     str max v   print  Min values is     str min v

User · Answer

l    -1 2  0 0  1   x   100 0 for i in l      if i  lt  x          x   i print  x    This is the answer  i needed this for my homework  took your code  and i deleted the     around the numbers  it then worked  i hope this helped

User · Answer

l is a list of strings  When you put numbers between single quotes like that  you are creating strings  which are just a sequence of characters  To make your code work properly  you would have to do this   l    -1 2  0 0  1     no quotation marks  x   100 0 for i in l      if i  lt  x          x   i print x   If you must use a list of strings  you can try to let Python try to make a number out of each string  This is similar to Justin s answer  except it understands floating-point  decimal  numbers correctly   l     -1 2    0 0    1    x   100 0 for i in l      inum   float i      if inum  lt  x          x   inum print x     I hope that this is code that you are writing to learn either Python or programming in general  If this is the case  great  However  if this is production code  consider using Python s built-in functions   l     -1 2    0 0    1   lnums   map float  l     turn strings to numbers x   min lnums     find minimum value print x

User · Answer

number list    99 5 1 2 -0 3   number list sort    print number list 0

User · Answer

To find the minimum value of a list  you might just as well use min   x   min float s  for s in l    min of a generator   Or  if you want the result as a string  rather than a float  use a key function   x   min l  key float

User · Answer

You aren t comparing integers  you re comparing strings  Strings compare lexicographically -- meaning character by character -- instead of  as you seem to want  by converting the value to a float  Make your list hold numbers  floats or integers  depending on what you want   or convert the strings to floats or integers in your loop  before you compare them   You may also be interested in the min builtin function  which already does what your current loop does  without the converting  that is

[python] Python: finding lowest integer

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