python programming Write an expression that is the concatenation of two strings s1 and s2

In C programming, how would you convert a string to a number without using atoi?

C++ programming

Please help with this question in python Write a python function that accept a string as input and calculates number of upper case letters and lower-case letters. Make use of python debugger module

Python Programming Only Please: Write a program that asks the user to enter a person’s age. The program should displaya message indicating whether the person is an infant, a child, a teenager, or an adult. Following are the guidelines: • If the person is 1 year old or less, he or she is an infant.• If the person is older than 1 year, but younger than 13 years, he or she is a child.• If the person is at least 13 years old, but less than 20 years old, he or she is a teenager.• If the person is at least 20 years old, he or she is an adult.

Utilizing an instance of a string object may help you locate the substring.

What header file must you include in order to use string objects?

language java