Submitted by tushar pramanick on Mon, 02/25/2013 - 10:56

Question and Answer

Q1. What is the difference between a constant and a variable?
A The major difference is that the value of a constant cannot be changed, while the value of a variable can. You can assign different values to a variable whenever it's necessary in your C program.

Q2. Why do you need a statement block?
Ans. Many C keywords can only control one statement. A statement block provides a way to put more than one statement together and put the statement block under the control of a C keyword. Then, the statement block is treated as a single statement.

Q3. Which arithmetic operators have a higher precedence?

Ans. Among the five arithmetic operators, the multiplication, division, and remainder operators have a higher precedence than the addition and subtraction operators.

Q4. How many parts does a function normally have?

Ans. A function normally has six parts: the function type, the function name, the arguments, the opening brace, the function body, and the closing brace.

Related Items

Manipulating Bits

Manipulating Bits

In previous hours, you learned that computer data and files are made of bits (or bytes). There is even an operator in C_the sizeof operator_that can be used to measure the number of bytes for data types.

Everything Is Logical

Everything Is Logical

Now, it's time for you to learn about a new set of operators: logical operators.

There are three logical operators in the C language:
&&     The logical AND operator
||     The logical OR operator

Question and Answer

    Q Why do we need the sizeof operator?

Exercises : Answer the following Question

To help solidify your understanding of this hour's lesson, you are encouraged to answer the quiz questions and finish the exercises provided in the Workshop before you move to the next lesson.

Playing with an Infinite Loop

Playing with an Infinite Loop

If you have a for statement like this,

for ( ; ; ){
  /* statement block */
}