what if condition

In JavaScript, which values can be used as conditions for if? 1. Boolean Variable True/false 2, the number is not 0, not nan/(0 or Nan) See the example below to think of negative numbers as if statements are false. var i =-1; if (i) { Alert (' here '

Objective:no matter what programming language is inseparable from conditional judgment. The shell is no exception. Copy Code code as follows: If List Then Do something here Elif List Then Do another thing Else Do something

1, to determine whether the drive, file or folder exists, with if exist statement; 2, to determine whether the two strings are equal, with the If "string 1" = "string 2" statement; 3, to determine whether the two values are equal, using the IF value

There are three different forms: The first of the simplest forms is: if [expression]; Then statements fi The second form is: if [expression1]; Then statements1 else statements0 fi The third

Objective: The coding style of the programming language is important for a long term maintenance software, especially in team collaboration. If a team uses a uniform coding style, it can improve the team's level of collaboration and productivity.

Sometimes, we need to set up a number of conditions at the same time to execute a piece of code, such as: the user only input QQ and password, to execute the login code, if only entered QQ or only entered a password, you can not execute the login

The examples in this paper describe the usage of true,false conditional judgment in Python. Share to everyone for your reference. The specific analysis is as follows: Programmers with programming experience know the wording of conditional

directory of this document First, arithmetic operators Second, assignment operator The increment operator and the self-decrement operator Iv. sizeof Five, comma operator Vi. Relational operators Seven, logical

First, arithmetic operationsThere are 34 types of operators in C, including common subtraction operations1. Addition Operation +L can also represent a plus:+5,+90 , except to do addition operations.2. Subtraction operation-L can do subtraction, but

First, arithmetic operationsThere are 34 types of operators in C, including the common subtraction operation 1. Addition Operation +L can also represent a plus: +5, +90 2, except that it can do addition operations. Subtraction Operation-In addition

First, the Process Control statement (if statement) in JSFormat:if ( condition 1) {if condition 1 is established, execute the code here}Else{if the condition is not true , execute the code here}format :if ( condition 1) {if condition 1 is

Directory of this document First, arithmetic operators Second, assignment operator The increment operator and the self-decrement operator Iv. sizeof Five, comma operator Vi. Relational operators Seven, logical

The examples in this article describe the use of true,false conditional judgment in Python. Share to everyone for your reference. The specific analysis is as follows: Programmers who have programming experience know how conditional statements are

This article mainly introduces the usage of True and False condition judgment in Python. the instance analyzes the condition judgment usage for different data types and has some reference value, for more information about how to use True and False

True and False conditions in Python determine instance analysis, and pythonfalse This article describes the True and False conditions in Python. Share it with you for your reference. The specific analysis is as follows: Programmers with programming

Arithmetic operations There are 34 types of operators in C, including common subtraction operations Addition Operation + Besides being able to do addition operations, it can also represent a plus sign: +5, +90

first, arithmetic operationsThere are 34 types of operators in C, including common subtraction operations1. Addition Operation +Besides being able to do addition operations, it can also represent a plus sign: +5, +902. Subtraction operation-Besides

First, arithmetic operationsThere are 34 types of operators in C, including common subtraction operations1. Addition Operation +Besides being able to do addition operations, it can also represent a plus sign:+5,+902. Subtraction operation-Besides

It is recommended that programmers skip this article and view the original article directly. You may see a do loop where the conditional expression is constant 0. it creates a loop that will only be executed once. this programming method can place

I. Arithmetic Operations There are 34 operators in C language, including common addition, subtraction, multiplication, division, and so on.1. addition operation + In addition to addition, the addition operation can also represent the positive signs: