AddressOf Operator in C - C Programming Tutorial 35

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Notes for You:: AddressOf Operator in C - C Programming Tutorial 35
- is used to get address (or reference) of a variable, or a constant.

Syntax:
&variableName

Example Code:
- C Progrm to display value and address of a variable.

#include <stdio.h>
int main()
{
int a=10, b=20;
printf("Value of a= %d\n",a); // 10
printf("Address of a= %p\n",&a); //0022FF1C
printf("Address of a= %d\n",&a); // 2293532
printf("\n");
printf("Value of b= %d\n",b); // 20
printf("Address of b= %p\n",&b); // 0022FF18
printf("Address of b= %d\n",&b); // 2293528

return 0;
}

Note:
- replace < with less-than symbol.
- replace > with greater-than symbol.

Note: Address of operator is used to
- read a value from the keyboard and assign it to some variable.
- assign address of a variable to a pointer and modify the value in it using pointer.
- pass address of a variable to a function and modify the value in it.
etc.

Example Code:
- C Program to find addition of 2 numbers.

#include <stdio.h>
int main()
{
int a=0, b=0, c=0;

printf("Enter a value for a:");
scanf("%d",&a); // 30
printf("Enter a value for b:");
scanf("%d",&b); // 40
c = a + b;
printf("Value of c= %d\n",c); // Value of c=70

return 0;
}

Note:
- replace < with less-than symbol.
- replace > with greater-than symbol.

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Answer the following questions: Let's see who gives the best answer
1. What is the purpose of address-of operator in C ?

ChidresTechTutorials
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It's so easy to understand while learning from childre's

Thanks

kadriahamadamouroivili
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sir for hexadecimal integers we use %x no sir?why did you use %p?

veerrajuannamdevula
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What if we use scanf("%d", a) ; will it raise an error

rohanyadav