Loop Control Structure CH# 05
HAPPY NEW YEAR 2021
Short Questions and Answers
i. Differentiate between For Loop and While Loop.
Ans: For Loop:
A loop used to execute a set of statements repeatedly for a fixed number of times in a program is called a for loop.
While Loop:
A loop used to implement repetition structure in a program when the number of iteration is not known in advance and the repetition continues until some condition remains true is called a while loop.
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ii. Differentiate between While and do While Loop.
Ans: While Loop:
A loop used to implement repetition structure in a program when the number of iteration is not known in advance and the repetition continues until some condition remains true is called a while loop.
- It is pre-tested loop.
- The iteration do not occur if the condition at the first iteration appears false.
- Controlling condition appears at the start.
Syntax:
while (condition)
{
statements; // body of the loop.
}
Do While Loop:
In do while loop the controlling condition appears at the end of the loop.
- It is post-tested loop
- The iteration occurs at least once even if the condition is false at the first iteration.
Syntax:
do {
statements; // body of the loop.
} (while condition);
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iii. What will be the output of the following code?
int k;for (k=1;k<=5;k++)
printf(\"I am a student");
printf("\n GOOD BYE");
Ans: I am a student
I am a student
I am a student
I am a student
I am a student
GOOD BYE
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iv. What will be the output of the following code?
int n;for (n=30;n>=10;n=n-5)
printf(\"%d",n);
Ans: 30
25
20
15
10
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v. Find errors in the following code.
int k,a
a=3;
k=1;
while (k<10);
{
printf(\n%f\t%f",k,k*a-1);
k=k+2;
}
Ans: int a,k;
a=3;
k=1;
while (k<10)
{
printf(\n%d\t%d",k,k*a-1);
k=k+2;
}
Output:
1 2
3 8
5 14
7 20
9 26
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vi. Convert the following for loop into a while loop?
int k;
for (k=25;k>0;k=k-3)
printf(\"%d",k);
Ans:
int k;
k=25;
while (k>0)
{
printf(\"%d",k);
k=k-3;
}
Fbise Notes-Computer | Loop Control Structure | Short Questions ch.no 5 class 10th
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August 23, 2019
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