not case-sensitive means

JavaScript is a case-sensitive language. This means that language keywords, variables, function names, and any other identifiers must always be typed with a consistent capitalization of letters. The while keyword, for example, must be typed “while”, not “While” or “WHILE”.

Yes, python is a case-sensitive language without a doubt . If we write a variable in a small letter and want to use it further in the program, then use it in the same manner only otherwise it will be considered as you are using a new variable.

C++ is case sensitive . In other words, uppercase and lowercase letters are considered to be different. A variable named age is different from Age, which is different from AGE.

Java is a case-sensitive language , which means that the upper or lower case of letters in your Java programs matter.