Precision Setting in C

February 10, 2023

Precision Setting :

Here, in this page we will discuss about the Precision Setting in C. For both float and double number outputs, precision is indicated by the number of digits after the decimal point.

About Precision Setting :

Precision, which is represented by the dot (.) symbol, determines the correctness of real numbers.
The precision, or accuracy, of the real number must be specified when printing the real numbers.
The default precision, which is six decimal digits after the decimal point, will be used if the precision is not specified.
Example of Precision of floating point number :

printf(“% .6f”, x) , it will print 6 digits after decimal .

Pointers in C

Pointer to arithmetic in C

Null pointer

Function Pointer as an argument

Pointer v/s array

Examples of Precision Setting :

Let,s see some example for better understanding :

Example 1:

Run

#include<stdio.h>

int main() {
    float val = 2.1;
    printf("Six decimal point : % .6f\n", val);
    printf("Three decimal point : %.3f\n", val);
    printf("Default Precision : %f", val);
    return 0;
}

Output :

Six decimal point :  2.100000
Three decimal point : 2.100
Default Precision : 2.100000

What Happened Above? In the program, we take the value val 2.1 and print it on the screen with different precision , also we can see that by default the precision is 6 digits.

Example 2 :

Run

#include<stdio.h>

int main() {
    double val = 4.12;
    printf("Six decimal point : % .6f\n", val);
    printf("Three decimal point : %.3f\n", val);
    printf("Default Precision : %f", val);
    return 0;
}

Output :

Six decimal point :  4.120000
Three decimal point : 4.120
Default Precision : 4.120000

What Happened Above? In the program, we take the value val 4.12 and print it on the screen with different precision , also we can see that by default the precision is 6 digits.

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Precision Setting in C