Variables are the names of storage locations that store data of different types upon execution of a code block.
The variable declaration tells a compiler that a named variable exists with a given data type. This only holds only at the time of code compilation. Variable declaration involves the defining and initializing of a variable.
Let’s look at the code below:
import std.stdio;/* variable definition: */int w, x;int y;int main () {/* Variable Initialization */w = 30;x = 40;y = x + w;writeln("Value of y is : ", y);return 0;}
From the code above, we add the values of two variables:
Lines 3 and 4: We define all the variables we use.
Lines 12 to 14: We initialize our variables by assigning values to them.
Line 15: We print the summation of variable x and variable y.