UNIT 2 LOOP CONTROL.pptx

Jumping Statements in C
• break is a keyword of C language.
• It is used to transfer the control of program out of switch or looping
statement.
#include<stdio.h>
int main()
{
int i;
for(i=1;i<=5;i++)
{
if(i==3)
break;
printf(“n%d”,i);
}return(0);
}
2

continue
• continue is a keyword of C language.
• It is used with looping statements. It is reverse of break statement.
• The continue statement forces the loop to continue or execute the next
iteration.
• When the continue statement is executed in the loop, the code inside the
loop following the continue statement will be skipped and the next
iteration of the loop will begin.
• #include<stdio.h>
int main()
{
int i;
for(i=1;i<=5;i++)
{
if(i==3)
continue;
printf(“n%d”,i);
}return(0);
} 3

goto
• goto is a keyword of C language.
• It is used to transfer the control of program from one part of program
to another part of program.
• It can be used anywhere in a program.
• goto statement can be used in two ways:
• Forward goto
• In forward goto statement, the label exists after the goto statement
• Backward goto
• In backward goto statement, the label exists before the goto statement.
4

Forward goto Backward goto
#include<stdio.h>
int main()
{
printf(“nwelcome”);
goto end;
printf(“nHi”);
end:
printf(“nBie”);
return(0);
}
#include<stdio.h>
int main()
{
int a;
scanf("%d",&a);
k:printf("%dn",a);
a++;
if(a<3)
goto k;
return 0;
}
5

Revision Questions
Q1 What is the output of the following source code?
#include<stdio.h>
int main()
{
int n;
for (n = 9; n!=0; n--)
printf("n = %d", n--);
return 0;
}
6

Revision Questions
#include <stdio.h>
int main()
{
int i = 0;
switch (i)
{
case '0': printf("CU");
break;
case '1': printf(“AU");
break;
default: printf("CU-AU");
}
return 0;
7

Revision Questions
#include <stdio.h>
int main()
{
int i;
for (i = 1; i != 10; i += 2)
printf(“ MST 2 ");
return 0;
}
8

Revision Questions
Q5 find the output
#include<stdio.h>
int main()
{
int i = -5;
while (i <= 5)
{
if (i >= 0)
break;
else
{
i++;
}
printf(“ C PROGRAMMING");
}
return 0;
} 9

Revision Questions
Q4 Predict the output of the below program:#include <stdio.h>
int main()
{
int i = 3;
switch(i)
{
printf("Outside ");
case 1: printf(“Case 1");
break;
case 2: printf(“case 2");
break;
defau1t: printf(“default");
}
return 0;
}
10

Revision Questions
Q6 #include <stdio.h>
int main()
{
int i = 3;
while (i--)
{
int i = 100;
i--;
printf("%d ", i);
}
return 0;
}
11

Revision Questions
Q7 #include <stdio.h>
int main()
{
int x = 3;
if (x == 2);
x = 0;
if (x == 3)
x++;
else x += 2;
printf("x = %d", x);
return 0;
}
12

Revision Questions
Q 8 #include<stdio.h>
int main()
{
int a = 5;
switch(a)
{
default:
a = 4;
case 6:
a--;
case 5:
a = a+1;
case 1:
a = a-1;
}
printf("%d n", a);
return 0;
} 13

Revision Questions
Q9 What is the output of C Program.?
int main()
{
while(true)
{
printf("RABBIT");
break; }
return 0;
}
14

Revision Questions
int main()
{ int a=5;
while(a==5)
{
printf("RABBIT");
break;
}
return 0;
}
15

Determine output:
main()
{
int i = abc(10);
printf("%d", --i);
}
int abc(int i)
{
return(i++);
}
16

What will be printed when this program is
executed?
int f(int x)
{
if(x <= 4)
return x;
return f(--x);
}
void main()
{
printf("%d ", f(7));
}
17

Revision Questions
int main()
{ int a=5;
while(a=123)
{
printf("RABBITn");
break;
}
printf("GREEN");
return 0; }
18

Revision Questions
Q 12 What is the output of C Program.?
int main()
{
int a=5;
while(a >= 3);
{
printf(“TEDDYn");
break;
}
printf(“BEAR");
return 0;
}
19

Revision Questions
int main() {
int k;
for(printf(“Hello "); printf(“CSE "); printf(“STUDENTS "))
{
break;
}
return 0;
}
20

Revision Questions
Q15 What will be the output of the following code?
#include <stdio.h>
int main()
{
int i = 0, j = 0;
while (i<5,j<10)
{
i++;
j++;
}
printf("%d %d", i, j);
}
21

Revision Questions
int main()
{
int a = 0;
while(a++)
{
printf(“C programming");
}
return 0;
}
22

Revision Questions
int main()
{
while(1);
{
printf("C Programming");
}
return 0;
}
23

Revision Questions
int main()
{
int i,j,count;
count=0;
for(i=0; i<5; i++);
{
for(j=0;j<5;j++);
{
count++;
}
}
printf("%d",count);
return 0;
}
24

Revision Questions
int main()
{
int i,j,k,count;
count=0;
for(i=0;i<5;i++)
{
for(j=0;j<5;j++)
{
count++;
}
}
printf("%d",count);
return 0;
}
25

Revision Questions
int main()
{
int i,j;
for(i = 0,j=0;i<5;i++)
{
printf("%d%d--",i,j);
}
return 0;
}
26

Revision Questions
Q 21 What will be the output of following program ?
#include <stdio.h>
void main()
{
char cnt=0;
for(;cnt++;printf("%d",cnt)) ;
printf("%d",cnt);
}
27

Revision Questions
#include <stdio.h>
void main()
{
int tally;
for(tally=0;tally<10;++tally)
{
printf("#");
if(tally>6)
continue;
printf("%d",tally);
}
}
28

Revision Questions
#include <stdio.h>
void main()
{
int cnt=1;
do
{
printf("%d,",cnt);
cnt+=1;
}while(cnt>=10);
printf("nAfter loop cnt=%d",cnt);
printf("n");
}
29

Revision Questions
int main()
{
int a = 0;
while(a++);
{
printf("Cpp");
}
return 0;
}
30

Revision Questions
Q 28 What will be the output of following program
int main()
{
int i;
for(i = 0,i<5,i++)
{
printf("Hello");
}
return 0;
}
31

Revision Questions
#include <stdio.h>
void main()
{
int k = 0;
for (k)
printf("Hello");
}
32

Revision Questions
#include <stdio.h>
int main()
{
int i = 0;
for (; ; ;)
printf("In for loopn");
printf("After loopn");
}
33

Revision Questions
Q 31 What is output of below program?
int main()
{
for(; ;);
for(; ;);
printf("Hello");
return 0;
}
34

What is an Array in C language.?
A) A group of elements of the same data type.
B) An array contains more than one element
C) Array elements are stored in memory in continuous or contiguous
locations.
D) All the above.
35

An array index starts with value
A) 0
B) -1
C) 1
D) 2
36

int main()
{
int a[ ];
a[4] = {1,2,3,4};
printf("%d", a[0]);
}
a) 1
b) 2
c) 3
d) Compiler Error
37

If the two strings are identical, then strcmp() function returns
A. -1
B. 1
C. 0
D. None
38

Base address of an array represents the
a) Address of last element of an array
b) Address of second element of an array
c) Address of first element of an array
d) Number of elements
39

Array elements are always stored in ________ memory locations.?
a) Sequential
b) Random
c) Sequential and Random
d) None of the above
40

What is the output of this program?
void main()
{
int a[8] = {1,2,3,4,5};
printf("%d", a[5]);
}
A. 5
B. 6
C. 0
D. Garbage Value
41

#include <stdio.h>
int main()
{
char s1[] = "Hello";
char s2[] = "Hello";
if(s1 == s2)
printf("Same");
else
printf("Not Same");
return 0;
}
• A. Not Same
• B. Same
• C. Compilation Error
• D. None of the above
42

#include<stdio.h>
int main()
{
int a[5] = {5, 1, 15, 20, 25};
int i, j, m;
i = ++a[1];
j = a[1]++;
m = a[i++];
printf("%d, %d, %d", i, j, m);
return 0;
}
43

What will be the output of the program ?
#include<stdio.h>
#include<string.h>
int main()
{
char str1[20] = "Hello", str2[20] = " World";
printf("%sn", strcpy(str2, strcat(str1, str2)));
return 0;
}
44

What will be the output of the following code?
void main()
{
int a[10];
printf("%d %d", a[-1], a[12]);
}
47

Which of the following correctly accesses the seventh element stored
in arr, an array with 100 elements?
A. arr[6]
B. arr[7]
C. arr{6}
D. arr{7}
E. None of these
48

• Which of the following function is more appropriate for reading in a
multi-word string?
A. scanf()
B. printf()
C. gets()
D. puts()
49

REVISION Questions
Predict output of following program
int main()
{
int i;
int arr[5] = {5};
for (i = 0; i < 5; i++)
printf("%d ", arr[i]);
return 0;
}
50

REVISION Questions
Q7 What is the output
int main()
{
int bus[3][] = {6,5,4,3,2,1};
printf("%d %d", bus[0][0], bus[2][1]);
return 0;
}
51

REVISION Questions
Q9 find the output
int main()
{
char str1[]=“CU";
char str2[20];
str2= str1;
printf("%s",str2);
return 0;
}
52

REVISION Questions
Q10 What is the output?
int main()
{
char str[25];
scanf("%s", str);
printf("%s",str);
return 0;
}
//input: New Delhi
53

#include<stdio.h>
int add(int a,int b=12)
{
return a+b;
}
int main()
{
int c ;
c=add(1,2);
printf("%d",c);
}
54

#include<stdio.h>
int add(int a,int b)
{
return a,return b;
}
int main()
{
int c ;
c=add(1,2);
printf("%d",c);
}
55

#include<stdio.h>
{
return a,b;
}
int main()
{
int c ;
c=add(1,2);
printf("%d",c);
return 0;
}
56

REVISION Questions
Find the output
void main()
{
int a;
printf("COUNT=");
a=show();
printf("%d", a);
}
int show()
{
return 15;
return 35;
}
57

Rohan writes the code for a function that computes the sum of n natural
numbers of the inputted number n.
int sum_n(int n)
{
if(n==1)
return 1;
else
missing statement
}
Fill in the missing statement.
58

• Sam is writing a code which has a function which calls itself. Which
programming concept is Sam using?
• The values passed to a function at the time of function calling are
knows as______________
• If we have to write a program to print first n natural ,which loop is
ideal?
59

Predict the Output of following C program ,if line 2 will be removed?
#include<stdio.h>
int add(int,int);//line 2
{
int sum=a+b;
return sum;
}
int main()
{
printf("%d",add(1,2));
return 0;
}
60

REVISION Questions
Q2 Find the output
int main()
{
int a[][] = {{1,2},{3,4}};
int i, j;
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
printf("%d ", a[i][j]);
return 0;
}
61

REVISION Questions
Q4 What is the output ?
int main()
{
char marks={'A','B','C'};
printf("%c", marks[0]);
}
62

REVISION Questions
Q16 What is the output?
63

21#include<stdio.h>
int main()
{
char str[7] = "IndiaRock";
printf("%sn", str);
return 0;
}
64

Revision Questions
#include < stdio.h >
int main()
{
int tally=0;
for(;;)
{
if(tally==10)
break;
printf("%d ",++tally);
}
return 0;
}
65

What is the output of C Program.?
int main()
{
int k, j;
for(k=1, j=10; k <= 5; k++)
{
printf("%d ", (k+j));
}
return 0;
}
66

find the output
#include<stdio.h>
int main()
{
int i = -5;
while (i <= 5)
{
if (i >= 0)
break;
else
{
i++;
continue;
}
printf(“ C PROGRAMMING");
} return 0; }
67

Revision Questions
#include <stdio.h>
void main()
{
int i=1;
while (i<=5)
{
printf("%d",i);
if (i==5)
goto print;
i++;
}
}
fun()
{
print:
printf("includehelp.com");
}
68

What is the output of C Program.?
int main()
{
int a=32;
do
{
printf("%d ", a);
a++;
if(a > 35)
break;
}while(1);
return 0;
}
69

void main()
{
printf(5+"Good Morningn");
}
A. Good Morning
B. M
C. Good
D. Morning
E. None of these
70

Let x be an array. Which of the following operations is/are illegal?
a) ++x
b) x+1
c) x++
d) x*2
71

#include <stdio.h>
int main()
{
int arr[5] = {1,2,3,4,5};
int p, q, r;
p = ++arr[1];
q = arr[1]++;
r = arr[p++];
printf("%d, %d, %d", p, q, r);
return 0;
}
72

Guess the output.
#include<stdio.h>
int main()
{
int a[8] = {1,2,[4]=7,8,9};
for(int i=0;i<8;i++)
printf("%d ",a[i]);
}
73

# include <stdio.h>
int main()
{
char str1[] = “Chandigarh";
char str2[] = {‘c’,’h’,’a’,’n’,’d’,’I’,’g’,’a’,’r’,’h’};
int n1 = sizeof(str1)/sizeof(str1[0]);
int n2 = sizeof(str2)/sizeof(str2[0]);
printf("n1 = %d, n2 = %d", n1, n2);
return 0;
}
74

• Which loop is faster in C Language, for, while or Do While.?
• a) for
• b) while
• c) do while
• d) All work at same speed
75

Revision Questions
Q 26 What will be the output in given input?
• When, input: 'a' and 1
int main()
{
int n,i=0;
while(scanf("%d",&n)==1)
{
printf("ENDn");
}
return 0;
}
76

UNIT 2 LOOP CONTROL.pptx

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