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C language loops | while loop 6

Example:26Factorial of a number , get the following outputExample:n=31*2*3=6n=51*2*3*4*5=120Sol:

```#include <stdio.h>

int main()
{
int i=1,n,f=1;
printf("Enter any no ");
scanf("%d",&n);
while(i<=n)
{
f=f*i;
printf("%d",i);
if(i<n)
printf(" * ");
i++;
}
printf(" = %d",f);
return 0;
}
```

Output:

Enter any no 5
1 * 2 * 3 * 4 * 5 = 120

Enter any no 3
1 * 2 * 3 = 6

Example:27C program to calculate the value of x to the power y by taking input for the values of base and power?Example :(i). b=2 p=3 : 2*2*2 =8(ii). b=2 p=5 : 2*2*2*2*2 =32Sol:

```#include <stdio.h>

int main()
{
int i=1,b,p,r=1;
printf("Enter values of base and power ");
scanf("%d %d",&b,&p);
while(i<=p)
{
r=r*b;
i++;
}
printf("Result  = %d",r);
return 0;
}
```

Output:

Enter values of base and power 2 5
Result = 32

Enter values of base and power 2 3
Result = 8

Example:28Print All upper case alphabet using while loopPrint all lower case alphabets using while loopPrint all digits using while loopSol:

```#include <stdio.h>

int main()
{
int i=65;
printf("Upper case alphabets\n");
while(i<=90)
{
printf("%c ",i);
i++;
}
printf("\n");
i='A';
while(i<='Z')
{
printf("%c ",i);
i++;
}
printf("\nLower case alphabets\n");
i=97;
while(i<=122)
{
printf("%c ",i);
i++;
}
printf("\n");
i='a';
while(i<='z')
{
printf("%c ",i);
i++;
}
printf("\nDigits\n");
i=48;
while(i<=57)
{
printf("%c ",i);
i++;
}
printf("\n");
i='0';
while(i<='9')
{
printf("%c ",i);
i++;
}
return 0;
return 0;
}
```

Output:

Upper case alphabets
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Lower case alphabets
a b c d e f g h i j k l m n o p q r s t u v w x y z
a b c d e f g h i j k l m n o p q r s t u v w x y z
Digits
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8 9

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