What Is IaaS , PaaS And SaaS? Explain With Examples?

Iaas - Infrastructure as a service is one of the cloud computing services that lease or rent servers for storage and compute purposes. For eg. AWS, Microsoft azure

PaaS - Platform as a service is a model that offers complete platforms such as hardware, infrastructure, and software for developing and running applications. For eg. Heroku, Force.com etc

SaaS - SaaS is a cloud-based service where you do not need to install the software in your system but directly access it through the internet browser.  For eg. Salesforce, Cisco WebEx etc