The compound assignment operator (+=) (§ 1.4.1, p. 12) appends the right-hand operand to the lefthand string

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2022-07-04

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The compound assignment operator (+=) (§ 1.4.1, p. 12) appends the right-hand operand to the lefthand string:

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KasimKamal

2022-07-04

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string s1 = "hello, ", s2 = "world\n";
string s3 = s1 + s2; // s3 is hello, world\n
s1 += s2; // equivalent to s1 = s1 + s2

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