What is the structure of an IF statement in JavaScript?
What is the structure of an IF statement in JavaScript?
“If” statements: where if a condition is true it is used to specify execution for a block of code. “Else” statements: where if the same condition is false it specifies the execution for a block of code. “Else if” statements: this specifies a new test if the first condition is false.
Can you have multiple if statements in JavaScript?
JavaScript will attempt to run all the statements in order, and if none of them are successful, it will default to the else block. You can have as many else if statements as necessary. In the case of many else if statements, the switch statement might be preferred for readability.
What is a conditional expression in JavaScript?
The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark (? ), then an expression to execute if the condition is truthy followed by a colon ( : ), and finally the expression to execute if the condition is falsy.
Can you have an if statement inside an if statement JavaScript?
Yes, JavaScript allows us to nest if statements within if statements. i.e, we can place an if statement inside another if statement.
What is Colon in JavaScript?
The colon symbol ( : ) is generally used by JavaScript as a delimiter between key/value pair in an object data type. The property brand has the value “Toyota” while the property color has the value “red” , and both used a colon to separate between the key and the value.
What is the IF-ELSE-if structure in JavaScript?
When a JavaScript if-else statement is placed within another JavaScript if-else statement, it is referred to as ‘JavaScript if -else-if’ structure. The if-else-if structure is also referred to as nest ‘ if-else’ structure. The nested if-else structure is used to select one of many blocks of code to be executed.
What is a nested if structure in JavaScript?
When JavaScript if the structure is used within another JavaScript if structure, it is called nested if structure. The general form of nested if statement is given as: In the above syntax, the JavaScript if statement that has “condition-1” contains another if statement that has “condition-2”. The nested if statement may also contain ‘else’ part.
How to make two-way decisions using JavaScript IF-ELSE structure?
The JavaScript if-else structure is used for making two-way decisions. In JavaScript if-else structure, one condition and two blocks of statement are given. Either one of the two blocks of statements is executed after evaluating the given condition. The JavaScript if-else structure, first the given condition is tested.
How do you use if in a sentence in JavaScript?
Syntax. if ( condition) {. // block of code to be executed if the condition is true. }. Note that if is in lowercase letters. Uppercase letters (If or IF) will generate a JavaScript error.
