Question

Q3. Which of the following are valid variable declaration(s)?
1.integer X;
2.let a_crowd=3;
3.int main=0;
4. double _2pct;
5. const E= 1;
6 double oxygen%;

Answer 1

1. Valid, but by convention lowercase letters are used to start variable names. Uppercase letters are for class names.
2. let is usually used in BASIC dialects
3. main is a reserved function name where execution starts in C, C++ and Java.
4. Valid
5. doesn't have a type
6. variable names usually can only be letters, numbers and underscores, and must begin with either a letter or underscore.

Answer 2

okk :)