List

Comparison Operators

String ComparisonDescription
Str1 = Str2Returns true if the strings are equal
Str1 != Str2Returns true if the strings are not equal
-n Str1Returns true if the string is not null
-z Str1Returns true if the string is null
Numeric ComparisonDescription
expr1 -eq expr2Returns true if the expressions are equal
expr1 -ne expr2Returns true if the expressions are not equal
expr1 -gt expr2Returns true if expr1 is greater than expr2
expr1 -ge expr2Returns true if expr1 is greater than or equal to expr2
expr1 -lt expr2Returns true if expr1 is less than expr2
expr1 -le expr2Returns true if expr1 is less than or equal to expr2
! expr1Negates the result of the expression
File ConditionalsDescription
-d fileTrue if the file is a directory
-e fileTrue if the file exists (note that this is not particularly portable, thus -f is generally used)
-f fileTrue if the provided string is a file
-g fileTrue if the group id is set on a file
-r fileTrue if the file is readable
-s fileTrue if the file has a non-zero size
-uTrue if the user id is set on a file
-wTrue if the file is writable
-xTrue if the file is an executable

Leave a Reply

Your email address will not be published.

  Posts

1 2 3
July 19th, 2022

Investing is important, learn about it from the leader in the segment.

Learn Investor Money Control

November 2nd, 2020

Churn Emails – Count Number Domain

Write a function count_message_from_domain which reads the file /cxldata/datasets/project/mbox-short.txt. This function builds a histogram using a dictionary to count how many messages have […]

November 2nd, 2020

Churn Emails – Count Number of Messages

Python Project – Churn Emails – Count Number of Messages From Each Email Address Write a function count_message_from_email which reads the file /datasets/project/mbox-short.txt.  […]

November 2nd, 2020

Churn Email: Day of the Week

Python Project – Churn Emails – Find Which Day of the Week the Email was sent Write a function find_email_sent_days which reads […]

October 20th, 2020

Compute the Compound Interest.py

Write a function with name compound_interest that takes three arguments: principle, rate and years in order. the rate is float […]

October 18th, 2020

String Data Type

A string is a sequence of characters. String Data Type str1=”hello” print(type(str1)) Ans: <class ‘str’> str2=’123′ print(type(str2)) Ans: <class ‘str’> […]

October 18th, 2020

String Library

String Replace str=”Hello Bob” print(str) rstr=str.replace(‘Bob’, ‘James’) print(rstr)   This will replace the Bob with James and store it in […]

October 17th, 2020

‘in’ statement in String

  fruits=’banana’ bana in fruits Ans: True Python Function to confirm he vowel in the given input. def is_vowel(l): return […]

September 24th, 2020

awk Marking keywords

Marking keywords In the following example, we mark Java keywords in a source file. $wget nishantmunjal.com/dataset/mark_keywords.awk # the program adds […]

September 24th, 2020

awk Rock-paper-scissors

Rock-paper-scissors Rock-paper-scissors is a popular hand game in which each player simultaneously forms one of three shapes with an outstretched […]