lecture-7.md

Lecture-7 Assignment Operators, Comparison Operators and Ternary Operator in C Programming

Assignment operators

Assignment operators applied to assign the result of an expression to a variable.

Assign (=)

💻Example:

#include <stdio.h>

int main() {
    
    int a = 10;
    
    printf("%d",a);
    
    return 0;
}

⚙️ Output :

10

Add then assign (+=)

💻Example:

#include <stdio.h>

int main() {
    
    int a =5;
    
    a += 3; //a = a + 3;
    
    printf("%d",a);
    
    return 0;
}

⚙️ Output :

8

Substract then assign (-=)

💻Example:

#include <stdio.h>

int main() {
    
    int a =5;
    
    a -= 3; //a = a - 3;
    
    printf("%d",a);
    
    return 0;
}

⚙️ Output :

2

Multiplies then assign (*=)

💻Example:

#include <stdio.h>

int main() {
    
    int a =5;
    
    a *= 3; //a = a * 3;
    
    printf("%d",a);
    
    return 0;
}

⚙️ Output :

15

Divides then assign(/=)

💻Example:

#include <stdio.h>

int main() {
    
    int a =10;
    
    a /= 2; //a = a / 2;
    
    printf("%d",a);
    
    return 0;
}

⚙️ Output :

5

Modulus then assign(%=)

💻Example:

#include <stdio.h>

int main() {
    
    int a =7;
    
    a %= 2; //a = a % 2;
    
    printf("%d",a);
    
    return 0;
}

⚙️ Output :

1

Comparison Operators

Equal to (==)

Equal to are used to compare to object.

💻Example:

// if value are not equal then print 0 means false.
#include <stdio.h>

int main() {
    
    int a = 5;
    int b = 10;
    
    int ans = (a==b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

0

💻Example:

// if value are equal then print 1 means true.
#include <stdio.h>

int main() {
    
    int a = 10;
    int b = 10;
    
    int ans = (a==b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

1

Greater than (>)

💻Example:

#include <stdio.h>

int main() {
    
    int a = 5;
    int b = 10;
    
    int ans = (a>b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

0

💻Example:

//a is greater than b then true.
#include <stdio.h>

int main() {
    
    int a = 5;
    int b = 2;
    
    int ans = (a>b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

1

Less than (<)

💻Example:

#include <stdio.h>

int main() {
    
    int a = 20;
    int b = 10;
    
    int ans = (a<b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

0

💻Example:

// a is less than b then true .
#include <stdio.h>

int main() {
    
    int a = 10;
    int b = 20;
    
    int ans = (a,b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

1

Less than or equal to (<=)

💻Example:

// a is less than or equal to b then true otherwise false.
#include <stdio.h>

int main() {
    
    int a = 100;
    int b = 10;
    
    int ans = (a<=b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

0

💻Example:

// a is less than or equal to b then true.
#include <stdio.h>

int main() {
    
    int a = 10;
    int b = 10;
    
    int ans = (a<=b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

1

greater than or equal to (>=)

💻Example:

// a is greater  than or equal to b then true otherwise false.
#include <stdio.h>

int main() {
    
    int a = 1;
    int b = 10;
    
    int ans = (a<=b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

0

💻Example:

// a is greater than or equal to b then true.
#include <stdio.h>

int main() {
    
    int a = 100;
    int b = 10;
    
    int ans = (a<=b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

1

not equal to (!=)

💻Example:

//a is not equal to b then true otherwise false.
#include <stdio.h>

int main() {
    
    int a = 10;
    int b = 10;
    
    int ans = (a!=b);
    
    printf("%d",ans);
    
    return 0;

⚙️ Output :

0

💻Example:

//a is not equal to b then true.
#include <stdio.h>

int main() {
    
    int a = 20;
    int b = 10;
    
    int ans = (a!=b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

1

Ternary Operator

Syntax :

(condition)?True:False

💻Example:

#include <stdio.h>

int main() {
    
    int a = 100;
    int b = 10;
    
    int ans = (a>b?a:b);
    
    printf("%d",ans);
    
    return 0;
}

⚙️ Output :

100

💻Example:

#include <stdio.h>

int main() {
    
    int num;
    printf("Enter Number :");
    scanf("%d",&num);
    
    int ans = (num%2==0)?printf("Even"):printf("odd");
    
    return 0;
}

⚙️ Output :

Even

🏠Homework

1️⃣ Write a program to take age from user and check if he / she eligible for voting.

🔗 Some Useful Links

📖 References