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Relational Operators in Objective-C
Following table shows all the relational operators supported by Objective-C language. Assume variable A holds 10 and variable B holds 20, then −
| Operator | Description | Example |
|---|---|---|
| == | Checks if the values of two operands are equal or not; if yes, then condition becomes true. | (A == B) is not true. |
| != | Checks if the values of two operands are equal or not; if values are not equal, then condition becomes true. | (A != B) is true. |
| > | Checks if the value of left operand is greater than the value of right operand; if yes, then condition becomes true. | (A > B) is not true. |
| < | Checks if the value of left operand is less than the value of right operand; if yes, then condition becomes true. | (A < B) is true. |
| >= | Checks if the value of left operand is greater than or equal to the value of right operand; if yes, then condition becomes true. | (A >= B) is not true. |
| <= | Checks if the value of left operand is less than or equal to the value of right operand; if yes, then condition becomes true. | (A <= B) is true. |
Example
Try the following example to understand all the relational operators available in Objective-C programming language −
#import <Foundation/Foundation.h>
int main() {
int a = 21;
int b = 10;
if( a == b ) {
NSLog(@"Line 1 - a is equal to b\n" );
} else {
NSLog(@"Line 1 - a is not equal to b\n" );
}
if ( a < b ) {
NSLog(@"Line 2 - a is less than b\n" );
} else {
NSLog(@"Line 2 - a is not less than b\n" );
}
if ( a > b ) {
NSLog(@"Line 3 - a is greater than b\n" );
} else {
NSLog(@"Line 3 - a is not greater than b\n" );
}
/* Lets change value of a and b */
a = 5;
b = 20;
if ( a <= b ) {
NSLog(@"Line 4 - a is either less than or equal to b\n" );
}
if ( b >= a ) {
NSLog(@"Line 5 - b is either greater than or equal to b\n" );
}
}
When you compile and execute the above program, it produces the following result −
2013-09-07 22:42:18.254 demo[9486] Line 1 - a is not equal to b 2013-09-07 22:42:18.254 demo[9486] Line 2 - a is not less than b 2013-09-07 22:42:18.254 demo[9486] Line 3 - a is greater than b 2013-09-07 22:42:18.254 demo[9486] Line 4 - a is either less than or equal to b 2013-09-07 22:42:18.254 demo[9486] Line 5 - b is either greater than or equal to b
objective_c_operators.htm
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