The first three lines are the same, we have discussed already in our first program. Now as we need to use variables in our program. So we first declare three variables x, y and z with their data type integer as following. int x; int y; int z; These three declarations can also be written on one line. C provides us the comma separator (,). The above three lines can be written in a single line as below int x, y, z; As we know that semicolon (;) indicates the end of the statement. So we can write many statements on a single line. In this way we can also write the above declarations in the following form int x; int y; int z; For good programming practice, write a single statement on a single line. Now we assign values to variables x and y by using assignment operator. The lines x = 5; and y = 10 assign the values 5 and 10 to the variables x and y, respectively. These statements put the values 5 and 10 to the memory locations labeled as x and y.
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