In TypeScript, the if...else statement controls the program's execution flow based on the different conditions. If the condition evaluates to true, the if block of code is executed. An if can be followed by an optional else block. The else block will execute if the Boolean expression test...
Learn about if else conditions in TypeScript. An if statement can include one or more expressions which return boolean.
conditions = { 'condition1': code_block1, 'condition2': code_block2, # 其他条件和代码块 } if condition in conditions: conditions[condition]() 使用函数或类:将不同的条件和对应的代码块封装成函数或类,通过调用函数或类的方式来执行代码块。这样可以使代码更加模块化和可维护。例如: 代码语言:txt 复...
Returns a boolean that indicates if the key can be found in the config. hasEnv(key): boolean Returns a boolean that indicates if the key can be found in the environment. set(key, value) Sets a key in the config to the supplied value is(key, value): boolean This will test if the ...
Check outHow to Capitalize the First Letter in TypeScript? 5. Combine Checks for Null, Undefined, and Empty In some cases, you might want to check for null, undefined, or empty strings all at once. This can be done using a combination of conditions. Here is the complete code. ...
Here, we have three conditions inside theifstatement. The first condition is a combination of two conditions in itself. In order for the first condition to betruethe inner two conditionsnum != 20andnum%2 == 0must also be true since there is an&&operator. Then we have the second conditio...
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Flexibility: if-else statements are versatile and can handle complex conditions. Range of Conditions: You can use relational operators, logical operators, and other expressions to create a wide range of conditions. Cons of If-else Code Redundancy: In scenarios where you have multiple conditions chec...
a=100;%check the boolean conditionifa==10%ifcondition istruethen print the followingfprintf('Value of a is 10');elseif(a==20)%ifelseifcondition istruefprintf('Value of a is 20');elseif a==30%ifelseifcondition istruefprintf('Value of a is 30');else%ifnoneofthe conditions istrue'...
ifupdates whenever a state variable used inside theifcondition or theelse ifcondition changes and re-evaluates the conditions. If the evaluation of the conditions changes, it means that another branch ofifneeds to be built. In this case, the ArkUI framework will: ...