Which statement is TRUE about if statement in the C programming language?
A non-zero value written in the condition means True
C does not have a dedicated boolean type in its original standard; instead it treats integer (and pointer) values as truth values in a condition. The rule is simple and fundamental: the value 0 is interpreted as False, and any non-zero value is interpreted as True. This applies to the controlling expression of if, while, for and the ternary operator alike.
Consequences of this rule are that if(5), if(-1) and if(0.1) all take the True branch because none of these values is zero, whereas if(0) takes the False branch (or the else, if present).
Evaluating the statements:
- A non-zero value in the condition means True — this is the correct statement and a direct restatement of C's truth rule.
- The claim that a value of 0 means True is the reverse of the actual convention; 0 means False.
- The claim that every
ifmust have a matchingelseis wrong: theelseclause is entirely optional, and a loneifis perfectly valid. - The claim that
ifstatements cannot be nested is also wrong; nesting oneifinside another (or inside anelse) is common and fully supported.
Hence only the statement that a non-zero condition value means True is correct.
Similar Questions
Consider the following code snippet in C programming language.
int n = 5;
int m = n++;
What is the value of m after execution?
Which shape is used to represent a decision in a flowchart?
You need to read a floating-point value from the user in the C programming language. Which of the following statements correctly performs this task?
What are the statements that begin with # symbol called in C programming language?
What is the output of the give C language code snippet?
void f(int x)
{
x = x + 5;
}
int main()
{
int a = 10;
f(a);
printf("%d",a);
return 0;
}
Important Questions from Programming in C
Which one is the reserved word in C language ?
Which of the following is the feature(s) of High level programming languages?
I. Portability
II. Easy debugging
Which of the following is a type of subprogram?
I. Function
II. Subroutine
In object-oriented programming, which keyword ensures that a member variable belongs to the class itself rather than to any specific object, thereby allowing all instances to share a single copy of that variable?
The condition num! = 65 cannot be replaced by
