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Questions and Answers
- What is the purpose of JavaScript in web development?
- What is the purpose of JavaScript in web development?
JavaScript is a programming language used to create dynamic content on web pages, allowing for interactive and responsive user experiences.
- How are variables declared in JavaScript? Provide examples.
- How are variables declared in JavaScript? Provide examples.
Variables in JavaScript can be declared using 'let' for mutable variables and 'const' for immutable variables. For example, let name = 'John'; const age = 25;
- What is the syntax for an if statement in JavaScript? Provide an example.
- What is the syntax for an if statement in JavaScript? Provide an example.
The syntax for an if statement in JavaScript is 'if (condition) { // code block } else { // code block }'. For example, if (age >= 18) { console.log('You are an adult'); } else { console.log('You are a minor'); }
- How are functions declared and called in JavaScript? Provide an example.
- How are functions declared and called in JavaScript? Provide an example.
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- What is the difference between global and local variables in JavaScript? Provide an example.
- What is the difference between global and local variables in JavaScript? Provide an example.
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What are the three basic data types in JavaScript? Provide examples for each.
What are the three basic data types in JavaScript? Provide examples for each.
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How are arrays created and manipulated in JavaScript? Provide an example.
How are arrays created and manipulated in JavaScript? Provide an example.
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What is the syntax for a for loop in JavaScript? Provide an example.
What is the syntax for a for loop in JavaScript? Provide an example.
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How are functions scoped in JavaScript? Provide an example.
How are functions scoped in JavaScript? Provide an example.
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What is the purpose of the alert() function in JavaScript? Provide an example.
What is the purpose of the alert() function in JavaScript? Provide an example.
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