C Programming - Declarations and Initializations - Discussion
Discussion Forum : Declarations and Initializations - General Questions (Q.No. 9)
9.
Identify which of the following are declarations
| 1 : | extern int x; |
| 2 : | float square ( float x ) { ... } |
| 3 : | double pow(double, double); |
Answer: Option
Explanation:
extern int x; - is an external variable declaration.
double pow(double, double); - is a function prototype declaration.
Therefore, 1 and 3 are declarations. 2 is definition.
double pow(double, double); - is a function prototype declaration.
Therefore, 1 and 3 are declarations. 2 is definition.
Discussion:
37 comments Page 4 of 4.
Aisha said:
7 years ago
Can you give an eg for initialization and explanation for output?
Prachi said:
6 years ago
The semicolon is not used in the function definition.
Nivu said:
5 years ago
Thanks all for explaining.
Mallikarjunagoud said:
5 years ago
@Babi,
For a variable, declaration means just stating its data type along with giving it name for memory allocation; while definition means giving the value of that variable. The declaration is giving a prototype like simply a name. The definition is associating the task or the meaning with the prototype.
For a variable, declaration means just stating its data type along with giving it name for memory allocation; while definition means giving the value of that variable. The declaration is giving a prototype like simply a name. The definition is associating the task or the meaning with the prototype.
Masanta said:
5 years ago
Thank you all for explaining it.
Sakshi wadhwa said:
4 years ago
Why float square(float x) is not a declaration? Please explain.
Tharun said:
3 years ago
During declaration, we tell the datatype of the Variable.
During definition, the value is initialized.
During definition, the value is initialized.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers