Write a function to convert a snake case string to camel cas...

Prompt

Write a function to convert a snake case string to camel case string. Your function should satisfy these tests: ```python assert snake_to_camel('python_program')=='PythonProgram' assert snake_to_camel('python_language')==('PythonLanguage') assert snake_to_camel('programming_language')==('ProgrammingLanguage') ```