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2. Variables and types
Variables and types
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Reading 1
A variable has a type and a name
A variable is a named place in memory. In C++ you must declare the type before you use the name.
Common types: - int for whole numbers (20, -3) - double for numbers with a fractional part (3.14) - char for a single character ('A') - bool for true or false
You can declare and assign in one step: int age = 20;
int count = 0;
double price = 9.99;
char grade = 'A';
bool done = false;Check 2
Pick a type
Which type is the best fit for the value 3.14?
Fill in 3
Integer keyword
Try it 4
Declare and print
Run the program. Change the values and print another variable.
main.cpp
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Output will appear here.
Assignment 5
Store and print an age
Declare an int named age with the value 20. Print only that number and a newline.
main.cpp
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