![]() ![]() If the condition does prove true, it will execute the code defined inside its code block. If the value on the left of the || does not equal to zero, false, null undefined, or an empty string, then the value on the left will be assigned to the variable.Īlthough the value on the left can be an undefined value for JS to evaluate the condition but the variable has to be declared otherwise an exception will be produced. An if statement will evaluate if a condition is true. Method 2: In this method, if the value of the left of the || is equal to zero, false, null, undefined, or an empty string, then the value on the right will be assigned to the variable. Var b = a > 0? (a = 1? "A is 1" : "A is not 1") : (a = 0? "A is zero" : "A is negative") JavaScript includes three forms of if condition: if condition, if else condition and else if. In any programming language, conditions play an important role in the execution of code in a particular sequence. So here the value of rawvalue (number) is compared to rawvalue > 10.0 (comparison expression) and rawvalue > 5.0 (comparison expression). Use if-else conditional statements to control the program flow. ![]() Nesting example of method 1: Change variable A value to 0, 1, 2 and a negative value to see how the statement would produce the result. In a switch statement, the evaluated value of the switch expression is compared the the evaluated values of the cases. ![]() You can also nest many conditions into one statement. If the condition evaluates to false the condition on the right will be assigned to the variable. Method 1: If the condition evaluates to true, the value on the left side of the column would be assigned to the variable. There are two methods I know of that you can declare a variable's value by conditions. The if/else statement is a part of JavaScript's 'Conditional' Statements, which are used to perform different actions based on different conditions. ![]()
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