What does “%d! = %ld'n” mean in this code?
I'm still a beginner at C, so I'm finding difficulty in understanding "%d! = %ld".
I know that %d and %ld are respectively used for an integer and long, so "! =" is confusing me.
#include<stdio.h>
long factorial(int);
int main() {
int n;
long f;
printf("Enter an non-negative integer: ");
scanf("%d", &n);
if (n < 0)
printf("Negative integers are not allowed.n");
else {
f = factorial(n);
printf("%d! = %ldn", n, f); //what does this mean?
}
return 0; }
long factorial(int n) {
if (n == 0)
return 1;
else
return(n * factorial(n-1)); }
c
asked Nov 22 at 17:59
Charles Abou Haidar
111
add a comment |
I'm still a beginner at C, so I'm finding difficulty in understanding "%d! = %ld".
I know that %d and %ld are respectively used for an integer and long, so "! =" is confusing me.
#include<stdio.h>
long factorial(int);
int main() {
int n;
long f;
printf("Enter an non-negative integer: ");
scanf("%d", &n);
if (n < 0)
printf("Negative integers are not allowed.n");
else {
f = factorial(n);
printf("%d! = %ldn", n, f); //what does this mean?
}
return 0; }
long factorial(int n) {
if (n == 0)
return 1;
else
return(n * factorial(n-1)); }
c
asked Nov 22 at 17:59
Charles Abou Haidar
111
That's just the mathematical notation for the factorial function. It doesn't affect the%dformat specifier in any way.
– Govind Parmar
Nov 22 at 18:01
3
have you looked at the output for clues? like the fact that the=is actually printed in the statement?
– Claies
Nov 22 at 18:02
1
"! ="ofprintf("%d! = %ldn"will print 3 characters:'!',' ','='.
– chux
Nov 22 at 18:05
add a comment |
I'm still a beginner at C, so I'm finding difficulty in understanding "%d! = %ld".
I know that %d and %ld are respectively used for an integer and long, so "! =" is confusing me.
#include<stdio.h>
long factorial(int);
int main() {
int n;
long f;
printf("Enter an non-negative integer: ");
scanf("%d", &n);
if (n < 0)
printf("Negative integers are not allowed.n");
else {
f = factorial(n);
printf("%d! = %ldn", n, f); //what does this mean?
}
return 0; }
long factorial(int n) {
if (n == 0)
return 1;
else
return(n * factorial(n-1)); }
c
asked Nov 22 at 17:59
Charles Abou Haidar
111
I'm still a beginner at C, so I'm finding difficulty in understanding "%d! = %ld".
I know that %d and %ld are respectively used for an integer and long, so "! =" is confusing me.
#include<stdio.h>
long factorial(int);
int main() {
int n;
long f;
printf("Enter an non-negative integer: ");
scanf("%d", &n);
if (n < 0)
printf("Negative integers are not allowed.n");
else {
f = factorial(n);
printf("%d! = %ldn", n, f); //what does this mean?
}
return 0; }
long factorial(int n) {
if (n == 0)
return 1;
else
return(n * factorial(n-1)); }
c
c
asked Nov 22 at 17:59
Charles Abou Haidar
111
asked Nov 22 at 17:59
Charles Abou Haidar
111
asked Nov 22 at 17:59
Charles Abou Haidar
111
asked Nov 22 at 17:59
Charles Abou Haidar
111
asked Nov 22 at 17:59
Charles Abou Haidar
111
111
That's just the mathematical notation for the factorial function. It doesn't affect the%dformat specifier in any way.
– Govind Parmar
Nov 22 at 18:01
3
have you looked at the output for clues? like the fact that the=is actually printed in the statement?
– Claies
Nov 22 at 18:02
1
"! ="ofprintf("%d! = %ldn"will print 3 characters:'!',' ','='.
– chux
Nov 22 at 18:05
add a comment |
That's just the mathematical notation for the factorial function. It doesn't affect the%dformat specifier in any way.
– Govind Parmar
Nov 22 at 18:01
3
have you looked at the output for clues? like the fact that the=is actually printed in the statement?
– Claies
Nov 22 at 18:02
1
"! ="ofprintf("%d! = %ldn"will print 3 characters:'!',' ','='.
– chux
Nov 22 at 18:05
That's just the mathematical notation for the factorial function. It doesn't affect the
%d format specifier in any way.– Govind Parmar
Nov 22 at 18:01
That's just the mathematical notation for the factorial function. It doesn't affect the
%d format specifier in any way.– Govind Parmar
Nov 22 at 18:01
3
3
have you looked at the output for clues? like the fact that the
= is actually printed in the statement?– Claies
Nov 22 at 18:02
have you looked at the output for clues? like the fact that the
= is actually printed in the statement?– Claies
Nov 22 at 18:02
1
1
"! =" of printf("%d! = %ldn" will print 3 characters: '!', ' ', '='.– chux
Nov 22 at 18:05
"! =" of printf("%d! = %ldn" will print 3 characters: '!', ' ', '='.– chux
Nov 22 at 18:05
add a comment |
4 Answers
4
active
oldest
votes
This will print:
%d, i.e. the decimal value ofint n
! =, i.e. the literal character sequence
%ld, i.e. the decimal value oflong f
answered Nov 22 at 18:02
DevSolar
47.6k1294167
add a comment |
%d and %ld are the formatting placeholders for int and long int in printf. The exclamation point is just the factorial symbol, as mentioned in the comment.
answered Nov 22 at 18:02
ahota
37128
add a comment |
printf() allows you to print a string with variables inside of it. Let's say you have a variable i, containing an integer, 7.
printf("My variable is %d", i);
Will print
My variable is 7
to the console! That's because %d is how you tell printf(), "Hey, put an integer variable here!". The integer is then supplied as the next argument to the function. In your case, %d represents the integer n, and %ld represents the long integer f. Since f might be really big, we make it a long, which means more bytes are allocated to it internally on your computer. So for example, if we wanted to get the factorial of 5 and print it, we might do the following:
printf("Factorial of %d equals %ldn", 5, factorial(5))
// this will print "Factorial of 5 is 120" then a newline
Oh, and n just means print a newline afterwords!
answered Nov 22 at 18:09
Alejandro Alvarado
18913
add a comment |
printf("%d! = %ldn", n, f); //what does this mean?
%d - print an integer as a signed decimal number.
l - specifies that the argument is a long int or unsigned long int as appropriate. %ld then prints a long int or unsigned long int
The printed text will become something like
n! = f
(factorial notation n!)
answered Nov 22 at 18:32
Andreas DM
6,21352450
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
This will print:
%d, i.e. the decimal value ofint n
! =, i.e. the literal character sequence
%ld, i.e. the decimal value oflong f
answered Nov 22 at 18:02
DevSolar
47.6k1294167
add a comment |
This will print:
%d, i.e. the decimal value ofint n
! =, i.e. the literal character sequence
%ld, i.e. the decimal value oflong f
answered Nov 22 at 18:02
DevSolar
47.6k1294167
add a comment |
This will print:
%d, i.e. the decimal value ofint n
! =, i.e. the literal character sequence
%ld, i.e. the decimal value oflong f
answered Nov 22 at 18:02
DevSolar
47.6k1294167
This will print:
%d, i.e. the decimal value ofint n
! =, i.e. the literal character sequence
%ld, i.e. the decimal value oflong f
answered Nov 22 at 18:02
DevSolar
47.6k1294167
answered Nov 22 at 18:02
DevSolar
47.6k1294167
answered Nov 22 at 18:02
DevSolar
47.6k1294167
answered Nov 22 at 18:02
DevSolar
47.6k1294167
47.6k1294167
add a comment |
add a comment |
%d and %ld are the formatting placeholders for int and long int in printf. The exclamation point is just the factorial symbol, as mentioned in the comment.
answered Nov 22 at 18:02
ahota
37128
add a comment |
%d and %ld are the formatting placeholders for int and long int in printf. The exclamation point is just the factorial symbol, as mentioned in the comment.
answered Nov 22 at 18:02
ahota
37128
add a comment |
%d and %ld are the formatting placeholders for int and long int in printf. The exclamation point is just the factorial symbol, as mentioned in the comment.
answered Nov 22 at 18:02
ahota
37128
%d and %ld are the formatting placeholders for int and long int in printf. The exclamation point is just the factorial symbol, as mentioned in the comment.
answered Nov 22 at 18:02
ahota
37128
answered Nov 22 at 18:02
ahota
37128
answered Nov 22 at 18:02
ahota
37128
answered Nov 22 at 18:02
ahota
37128
37128
add a comment |
add a comment |
printf() allows you to print a string with variables inside of it. Let's say you have a variable i, containing an integer, 7.
printf("My variable is %d", i);
Will print
My variable is 7
to the console! That's because %d is how you tell printf(), "Hey, put an integer variable here!". The integer is then supplied as the next argument to the function. In your case, %d represents the integer n, and %ld represents the long integer f. Since f might be really big, we make it a long, which means more bytes are allocated to it internally on your computer. So for example, if we wanted to get the factorial of 5 and print it, we might do the following:
printf("Factorial of %d equals %ldn", 5, factorial(5))
// this will print "Factorial of 5 is 120" then a newline
Oh, and n just means print a newline afterwords!
answered Nov 22 at 18:09
Alejandro Alvarado
18913
add a comment |
printf() allows you to print a string with variables inside of it. Let's say you have a variable i, containing an integer, 7.
printf("My variable is %d", i);
Will print
My variable is 7
to the console! That's because %d is how you tell printf(), "Hey, put an integer variable here!". The integer is then supplied as the next argument to the function. In your case, %d represents the integer n, and %ld represents the long integer f. Since f might be really big, we make it a long, which means more bytes are allocated to it internally on your computer. So for example, if we wanted to get the factorial of 5 and print it, we might do the following:
printf("Factorial of %d equals %ldn", 5, factorial(5))
// this will print "Factorial of 5 is 120" then a newline
Oh, and n just means print a newline afterwords!
answered Nov 22 at 18:09
Alejandro Alvarado
18913
add a comment |
printf() allows you to print a string with variables inside of it. Let's say you have a variable i, containing an integer, 7.
printf("My variable is %d", i);
Will print
My variable is 7
to the console! That's because %d is how you tell printf(), "Hey, put an integer variable here!". The integer is then supplied as the next argument to the function. In your case, %d represents the integer n, and %ld represents the long integer f. Since f might be really big, we make it a long, which means more bytes are allocated to it internally on your computer. So for example, if we wanted to get the factorial of 5 and print it, we might do the following:
printf("Factorial of %d equals %ldn", 5, factorial(5))
// this will print "Factorial of 5 is 120" then a newline
Oh, and n just means print a newline afterwords!
answered Nov 22 at 18:09
Alejandro Alvarado
18913
printf() allows you to print a string with variables inside of it. Let's say you have a variable i, containing an integer, 7.
printf("My variable is %d", i);
Will print
My variable is 7
to the console! That's because %d is how you tell printf(), "Hey, put an integer variable here!". The integer is then supplied as the next argument to the function. In your case, %d represents the integer n, and %ld represents the long integer f. Since f might be really big, we make it a long, which means more bytes are allocated to it internally on your computer. So for example, if we wanted to get the factorial of 5 and print it, we might do the following:
printf("Factorial of %d equals %ldn", 5, factorial(5))
// this will print "Factorial of 5 is 120" then a newline
Oh, and n just means print a newline afterwords!
answered Nov 22 at 18:09
Alejandro Alvarado
18913
answered Nov 22 at 18:09
Alejandro Alvarado
18913
answered Nov 22 at 18:09
Alejandro Alvarado
18913
answered Nov 22 at 18:09
Alejandro Alvarado
18913
18913
add a comment |
add a comment |
printf("%d! = %ldn", n, f); //what does this mean?
%d - print an integer as a signed decimal number.
l - specifies that the argument is a long int or unsigned long int as appropriate. %ld then prints a long int or unsigned long int
The printed text will become something like
n! = f
(factorial notation n!)
answered Nov 22 at 18:32
Andreas DM
6,21352450
add a comment |
printf("%d! = %ldn", n, f); //what does this mean?
%d - print an integer as a signed decimal number.
l - specifies that the argument is a long int or unsigned long int as appropriate. %ld then prints a long int or unsigned long int
The printed text will become something like
n! = f
(factorial notation n!)
answered Nov 22 at 18:32
Andreas DM
6,21352450
add a comment |
printf("%d! = %ldn", n, f); //what does this mean?
%d - print an integer as a signed decimal number.
l - specifies that the argument is a long int or unsigned long int as appropriate. %ld then prints a long int or unsigned long int
The printed text will become something like
n! = f
(factorial notation n!)
answered Nov 22 at 18:32
Andreas DM
6,21352450
printf("%d! = %ldn", n, f); //what does this mean?
%d - print an integer as a signed decimal number.
l - specifies that the argument is a long int or unsigned long int as appropriate. %ld then prints a long int or unsigned long int
The printed text will become something like
n! = f
(factorial notation n!)
answered Nov 22 at 18:32
Andreas DM
6,21352450
answered Nov 22 at 18:32
Andreas DM
6,21352450
answered Nov 22 at 18:32
Andreas DM
6,21352450
answered Nov 22 at 18:32
Andreas DM
6,21352450
6,21352450
add a comment |
add a comment |
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That's just the mathematical notation for the factorial function. It doesn't affect the
%dformat specifier in any way.– Govind Parmar
Nov 22 at 18:01
3
have you looked at the output for clues? like the fact that the
=is actually printed in the statement?– Claies
Nov 22 at 18:02
1
"! ="ofprintf("%d! = %ldn"will print 3 characters:'!',' ','='.– chux
Nov 22 at 18:05