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Python program to print negative numbers in a list

  • Difficulty Level : Medium
  • Last Updated : 26 Oct, 2018

Given a list of numbers, write a Python program to print all negative numbers in given list.

Example:

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Input: list1 = [12, -7, 5, 64, -14]
Output: -7, -14

Input: list2 = [12, 14, -95, 3]
Output: -95

Example #1: Print all negative numbers from given list using for loop



Iterate each element in the list using for loop and check if number is less than 0. If the condition satisfies, then only print the number.




# Python program to print negative Numbers in a List
  
# list of numbers
list1 = [11, -21, 0, 45, 66, -93]
  
# iterating each number in list
for num in list1:
      
    # checking condition
    if num < 0:
       print(num, end = " ")

Output:

-21 -93 

 
Example #2: Using while loop




# Python program to print negative Numbers in a List
  
# list of numbers
list1 = [-10, 21, -4, -45, -66, 93]
num = 0
  
# using while loop     
while(num < len(list1)):
      
    # checking condition
    if list1[num] < 0:
        print(list1[num], end = " ")
      
    # increment num 
    num += 1
     

Output:

-10 -4 -45 -66 

 
Example #3: Using list comprehension




# Python program to print negative Numbers in a List
  
# list of numbers
list1 = [-10, -21, -4, 45, -66, 93]
  
# using list comprehension
neg_nos = [num for num in list1 if num < 0]
  
print("Negative numbers in the list: ", *neg_nos)

Output:

Negative numbers in the list:  -10 -21 -4 -66

 
Example #4: Using lambda expressions




# Python program to print negative Numbers in a List
  
# list of numbers 
list1 = [-10, 21, 4, -45, -66, 93, -11
  
  
# we can also print negative no's using lambda exp. 
neg_nos = list(filter(lambda x: (x < 0), list1))
  
print("Negative numbers in the list: ", *neg_nos) 

Output:

Negative numbers in the list:  -10 -45 -66 -11



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