Variables in C++
Variables:
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Variables are named locations in memory that are used to hold a value that may be modified by the program.
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A variable may take different values at different times during execution.
Syntax for variable declaration :
DataType IdentifierName;e.g. int a = 20;
Declaring, Initializing, and Assigning Variables:
int number; | //this is called declaration |
We can also declare and assign some content to a variable at the same time, is called initialization. | |
int number = 20; | //this is called initialization |
After declaring variables, you can assign a value to a variable later on using a statement like this: | |
num = 30; | //this is called assignment |
We can also assign a variable the value of another variable, like so: | |
num = num1; |
Example :
#include<iostream> int main() //main function { int x, y; //declaration int z = 90; //initialization x = z; //assignment cout<<"Hello World!!\n"; return 0; }
Next topic is variable-scope
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