Learn Ibm-cloud-functions - 10 Code Examples & CST Typing Practice Test

IBM Cloud Functions is a serverless platform based on Apache OpenWhisk that allows developers to run code in response to events without managing infrastructure. It supports multiple runtimes and integrates with IBM Cloud services for event-driven applications.

View all 10 Ibm-cloud-functions code examples →

Simple IBM Cloud Function (Node.js)IBM Cloud Function with Parameters IBM Cloud Function Returning JSON IBM Cloud Function Handling HTTP Method IBM Cloud Function Using Environment Variable IBM Cloud Function Redirect IBM Cloud Function with Custom Headers IBM Cloud Function Fetching External API IBM Cloud Function Serving HTML IBM Cloud Function Conditional Response

Learn IBM-CLOUD-FUNCTIONS with Real Code Examples

Updated Nov 25, 2025

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Code Sample Descriptions

Simple IBM Cloud Function (Node.js)

# ibm_cloud/demo/hello.js
function main(params) {
    return { body: 'Hello, IBM Cloud!' };
}
exports.main = main;

A simple IBM Cloud Function that returns 'Hello, IBM Cloud!' when invoked.

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IBM Cloud Function with Parameters

# ibm_cloud/demo/params.js
function main(params) {
    const name = params.name || 'Guest';
    return { body: `Hello, ${name}!` };
}
exports.main = main;

A Cloud Function that greets a user based on input parameters.

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IBM Cloud Function Returning JSON

# ibm_cloud/demo/json.js
function main(params) {
    return { body: { message: 'Hello JSON!' } };
}
exports.main = main;

A function returning a JSON object.

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IBM Cloud Function Handling HTTP Method

# ibm_cloud/demo/method.js
function main(params) {
    const method = params.__ow_method;
    if (method === 'POST') {
        return { body: 'You sent a POST request' };
    }
    return { body: 'You sent a GET request' };
}
exports.main = main;

A function responding differently based on HTTP method.

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IBM Cloud Function Using Environment Variable

# ibm_cloud/demo/env.js
function main(params) {
    const apiKey = process.env.MY_API_KEY || 'NotSet';
    return { body: `API Key length: ${apiKey.length}` };
}
exports.main = main;

A function accessing an environment variable.

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IBM Cloud Function Redirect

# ibm_cloud/demo/redirect.js
function main(params) {
    return {
        statusCode: 302,
        headers: { Location: 'https://example.com' },
        body: ''
    };
}
exports.main = main;

A function that responds with a redirect.

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IBM Cloud Function with Custom Headers

# ibm_cloud/demo/headers.js
function main(params) {
    return {
        statusCode: 200,
        headers: { 'X-Custom-Header': 'IBMCloudFunction' },
        body: 'Custom headers added'
    };
}
exports.main = main;

A function adding custom headers to the response.

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IBM Cloud Function Fetching External API

# ibm_cloud/demo/fetch.js
const fetch = require('node-fetch');
async function main(params) {
    const response = await fetch('https://api.github.com');
    const data = await response.json();
    return { body: data };
}
exports.main = main;

A function fetching data from an external API and returning it.

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IBM Cloud Function Serving HTML

# ibm_cloud/demo/html.js
function main(params) {
    const html = '<!DOCTYPE html><html><body><h1>Hello HTML!</h1></body></html>';
    return {
        statusCode: 200,
        headers: { 'Content-Type': 'text/html' },
        body: html
    };
}
exports.main = main;

A function responding with a simple HTML page.

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IBM Cloud Function Conditional Response

# ibm_cloud/demo/conditional.js
function main(params) {
    if (params.action === 'ping') {
        return { body: 'pong' };
    }
    return { body: 'unknown action' };
}
exports.main = main;

A function responding differently based on query parameter.

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Frequently Asked Questions about Ibm-cloud-functions

What is Ibm-cloud-functions?

What are the primary use cases for Ibm-cloud-functions?

Event-driven microservices. Serverless REST APIs. Data processing and ETL pipelines. Webhook handlers and cron jobs. Integrating AI/ML services into serverless workflows

What are the strengths of Ibm-cloud-functions?

Enterprise-grade reliability and security. Tight integration with IBM Cloud ecosystem. Supports complex workflows with sequences and compositions. Flexible triggers from multiple sources. Automatic scaling and resource management

What are the limitations of Ibm-cloud-functions?

Vendor lock-in to IBM Cloud platform. Cold start latency for some runtimes. Function execution time limits (short-lived tasks preferred). Less optimized for front-end or edge use cases compared to Vercel/Cloudflare. Requires familiarity with IBM Cloud services for full benefits

How can I practice Ibm-cloud-functions typing speed?

CodeSpeedTest offers 10+ real Ibm-cloud-functions code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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Code Sample Descriptions

Simple IBM Cloud Function (Node.js)

# ibm_cloud/demo/hello.js
function main(params) {
    return { body: 'Hello, IBM Cloud!' };
}
exports.main = main;

A simple IBM Cloud Function that returns 'Hello, IBM Cloud!' when invoked.

Let’s Try →

IBM Cloud Function with Parameters

# ibm_cloud/demo/params.js
function main(params) {
    const name = params.name || 'Guest';
    return { body: `Hello, ${name}!` };
}
exports.main = main;

A Cloud Function that greets a user based on input parameters.

Let’s Try →

IBM Cloud Function Returning JSON

# ibm_cloud/demo/json.js
function main(params) {
    return { body: { message: 'Hello JSON!' } };
}
exports.main = main;

A function returning a JSON object.

Let’s Try →

IBM Cloud Function Handling HTTP Method

# ibm_cloud/demo/method.js
function main(params) {
    const method = params.__ow_method;
    if (method === 'POST') {
        return { body: 'You sent a POST request' };
    }
    return { body: 'You sent a GET request' };
}
exports.main = main;

A function responding differently based on HTTP method.

Let’s Try →

IBM Cloud Function Using Environment Variable

# ibm_cloud/demo/env.js
function main(params) {
    const apiKey = process.env.MY_API_KEY || 'NotSet';
    return { body: `API Key length: ${apiKey.length}` };
}
exports.main = main;

A function accessing an environment variable.

Let’s Try →

IBM Cloud Function Redirect

# ibm_cloud/demo/redirect.js
function main(params) {
    return {
        statusCode: 302,
        headers: { Location: 'https://example.com' },
        body: ''
    };
}
exports.main = main;

A function that responds with a redirect.

Let’s Try →

IBM Cloud Function with Custom Headers

# ibm_cloud/demo/headers.js
function main(params) {
    return {
        statusCode: 200,
        headers: { 'X-Custom-Header': 'IBMCloudFunction' },
        body: 'Custom headers added'
    };
}
exports.main = main;

A function adding custom headers to the response.

Let’s Try →

IBM Cloud Function Fetching External API

# ibm_cloud/demo/fetch.js
const fetch = require('node-fetch');
async function main(params) {
    const response = await fetch('https://api.github.com');
    const data = await response.json();
    return { body: data };
}
exports.main = main;

A function fetching data from an external API and returning it.

Let’s Try →

IBM Cloud Function Serving HTML

# ibm_cloud/demo/html.js
function main(params) {
    const html = '<!DOCTYPE html><html><body><h1>Hello HTML!</h1></body></html>';
    return {
        statusCode: 200,
        headers: { 'Content-Type': 'text/html' },
        body: html
    };
}
exports.main = main;

A function responding with a simple HTML page.

Let’s Try →

IBM Cloud Function Conditional Response

# ibm_cloud/demo/conditional.js
function main(params) {
    if (params.action === 'ping') {
        return { body: 'pong' };
    }
    return { body: 'unknown action' };
}
exports.main = main;

A function responding differently based on query parameter.

Let’s Try →

Frequently Asked Questions about Ibm-cloud-functions

What is Ibm-cloud-functions?

What are the primary use cases for Ibm-cloud-functions?

Event-driven microservices. Serverless REST APIs. Data processing and ETL pipelines. Webhook handlers and cron jobs. Integrating AI/ML services into serverless workflows

What are the strengths of Ibm-cloud-functions?

What are the limitations of Ibm-cloud-functions?

How can I practice Ibm-cloud-functions typing speed?

CodeSpeedTest offers 10+ real Ibm-cloud-functions code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.